Pennzoil makes a good syn. the other Pennzoil website Bob is the oil guy, shows tons of UOA analyis tons and they all look pretty good. It is hard to compare the other oils such as Quaker State Valvoline Castrol as the UOA data is mostly Amsoil Mobil 1 and Pennzoil over and overagain. Something is fishy but who am i to say? Getting back to the subject, Pennzoil in the syn. version is a good buy. Keep in mind it is the same oil as Quaker State full syn.So as mentioned before the one on sale is your choice

Pennzoil conventional and synthetic are both excellent oils. I have torn down many engines, and I have only seen one engine that ran Pennzoil that was sludged or waxed up. The thermostat on a 460 ford had been removed, and yes the engine was sludged up. That was no fault of the oil, that was stupidity on the part of the owner. To be perfectly honest, I have never torn down an engine that was sludged up that the oil can be blamed for the condition. Faulty thermostats, bad pcv valves, sorry gasoline, and poor service are the major factors in sludged up engines. Pennzoil in oder engines, both synthetic and conventional, comes out very black and dirty when drained. That means that its detergent package is doing just what it is supposed to do. If you do not like Pennzoil, just run it and send it off for oil analysis. When you get the report back, you will find you have nothing to gripe about.

Their conventional is very good, no experience with their synthetics however I have heard good things.

fine oils. Penz. Platinum is great value, up there with Mobil 1 & Castrol Synthetics.

Gr8 stuff! What is all this crap about waxy build up?!? Waxy build up comes from not changing your oil and filter when you should. Any moron knows that. I have been using PZ since 1995 in my following vehicles... 1986 FORD F150 5.0 V8, 1993 F250 5.8 V8 HD, 2000 Dodge Durango 4.7V8, 2006 Kia Optima 2.4 I4. just to name a few. When I got the durango it had a fair amount of sludge (2 years ago) Owner serviced it frequently, (4.7 is notorius for sludge because they don't breathe good) and when i got it i replaced the PCV valve, and started running PZ. Not only after 3 oil changes at 1500 mile intervals did it clean the engine out, it also stopped the loud chattering valve train. Think about that one I cant argue with other's personal experiences, but I can argue that this stuff will not sludge up your engine if you change your (censored) oil!

Garbage oil. Changed oil in cars that used it. Nuh uh I won't use it

i personally believe opinions are like asses everyone has one, and some stink. in reality i feel all the major brands are good, i never read good things about all oils, some say mobil, others hate mpbile, some swear by castrol, some say no good, it basically goes on and on. they are all good oils, despite what people say or think, everyones idea of the best oil is different.

i personally believe opinions are like asses everyone has one, and some stink. in reality i feel all the major brands are good, i never read good things about all oils, some say mobil, others hate mpbile, some swear by castrol, some say no good, it basically goes on and on. they are all good oils, despite what people say or think, everyones idea of the best oil is different.

made my car eat oil. switched to royal purple and the problem stopped.

It's funny that all the negative posters totally ignore all the testing lab's analysis! PP is usually rated right up there with Mobil 1. And, at almost $7 cheaper for 5 qts. (Walmart), it's probably the best deal out there!

The ignorance in some of these posts claiming wax, sludge, etc would be laughable if it weren't so pathetic. Some are using the wax B.S. for a scapegoat for either poor maintenance or other factors beyond their comprehension or ability to research. Others are just indulging in stubbornness or self-righteousness which makes them appear even more uneducated. These kind of people will always be found and hinder progress with their ignorance and blinders. As far back as the earth is flat and the earth is the center of the universe all the way to 'I can make candles out of the wax in my engine from Pennzoil' and the like... Sad.

The best motor oil for the price. Plus all the Used Oil Analysis prove what a great oil this is

The wax buildup is a good thing - keeps the parts separated better.

Thicker is always better, so wax HAS to be the best!

This stuff is terrible and contains alot of wax, I used to be fan in my econemy car until it devoloped a nock due to sludge and then switched to castrol and now it seems better.

haha, you guys make me laugh. I use penzoil platinum in my 99 altima, and valve train on these engines are naturally loud, it has kept it quiet for the last 2 years I have been using it, I used to use castrol gtx and syntec blend, and I still like them just as much as a like this oil. I went about 5500 miles on this last change, and it still looked good.

Pennzoil makes terrible motor oil. It causes wax build up, sludge, startup problems, flat tires, and just all car problems in general. DO NOT USE THIS OIL IN YOUR CARS. Instead, please send your unused Pennzoil to me. If you have 5w20 PP, it is more preferred.

There is a lot of good oil info on these forums, please edumacate yourselves:
http://www.bobistheoilguy.com/forums/

A very good brand to use for any type of car. very clean and doesn't create build up.
Pennzoil Platinum is however a very good oil! It keeps everything running nice and smooth. A very clean oil!

this response if to the guy below (goodone-1)

actually if you knew how an engine works, you would realize that the intake valve stems are constantly in oil, and that a very small amount of oil alway seeps past the seal. pennzoil oil has a detergent in it that gums up the engine, and leads to engine failure, its like sludge in a bottle. dont use it. ask any person (including myself) that rebuilds engines for a living, when we take apart the engine and see all the gum/wax whatever you wanna call it, we ask the customer what oil they used... guess what they say. and thats one more person that i helped realize why there engine prematurely died.

i used to use pennzoil in both of my motorcycles and in my first truck, which was a 1984 ford f150 after that truck decided to take a dive i took it apart and there was enough wax to start selling candles now the only thing i use is castrol. the truck i have now which is a 91 f250 runs great even when hauling long distances

best oil i have used does better than opti2 shit as i am a master mechanic for briggs and stratton in kentucky OUR products are manufacted from pennzoil lab test shows it produces less sludge varnish and waxes than any other engine oil in harsh conditions and great conditions so i highly recommend this engine oil

Strong product

  I used (5w-30) yellow jug --this in my 3.3 liter dodge intrepid for 11 years with yearly oil change along with a large size oil filter , as I towed with this car. Never had a problem and it always worked fine for me . I like the oil

I've had wonderful luck with Pennzoil Platinum Synthetic 10W-30 in my '89 Mustang. As someone whose worked in the auto industry, I give it a huge thumbs up for quality and value.

I started to use this oil in my vehicle and it started to smoke! I changed oil brands and it stopped smoking and using oil. I have not had a good impression of this oil.

Nothing wrong with Pennzoil. Quit using it due to higher price is all. Have many trouble free, sludge free, wax free miles from 40+ years of driving and wrenching.

I'm use Pennzoil Platinum 5w30 for more than one year and work very well, specialy in cold weather.

I never had a problem with Pennzoil.  It worked wonderfully with my '73 Mustang.  
The bad thing is that they got jacked up in price.  I remember when they were $1.XX a quart and now it's about $2.89.  So now I end up using other oils like Exxon or if I'm really desperate... Coastal.  

very bad

never had a problem w/ pennzoil

Funny Kidv, that exactly how I recall the group III debate.

People who don't even know how to change their own oil shouldn't be rating motor oils, Pennzoil, Mobil 1 or otherwise. With regular maintenance and use of the proper weight motor oil for the application and season, I'll pour a QT of Pennzoil into my engine as soon as any comer.

"Penzoil is responsible for legitimising the labeling of Group III semi syn as "full synthetic", and don't even forgive them for that!" I thought that occurred when Mobil brought Castrol to court for making claims that Syntec was "synthetic" - group3.?.

This says it all!

Penzoil is at best not harmful. But right now it is highly over rated that's for sure. The wax buildup claim is crap though. You would surely be far better off with Castrol Syntec or Mobil1 Synthetic.

Penzoil is responsible for legitimising the labeling of Group III semi syn as "full synthetic", and don't even forgive them for that!

This is some of the most biased crap that I have ever read with no data to back up clams. Wax build up on intake valves? Intake valves are part of the fuel system. Motor oil does not even touch them. Unless you are putting motor oil in your gas tank. I can see the person who posted that is a real genius. cazzy (0) 01/13/2007 Pennzoil = SHELL OIL Co = guess who. Hint: Rhymes with tush. Shell oil is Dutch Royal Company. Brush up on some facts before you share your opinion. 123qwe (0) 11/08/2005 Pennzoil sucks so bad i could develop an oil right now that is better than it. I know a friend who used their conventional oil twice. During the second run with it he noticed something terribly wrong with the engine. He is also mechanic so he took the engine apart and was shocked to see all of the wax build up in the intake and valves and pistons. We both tell people NEVER to use Pennzoil, its not a suprise I rarely hear anything good about Pennzoil, I hear that the new Platinum is pretty bad too. Yeah that is why it is the best selling motor oil in the United States. bigalnews (0) 07/20/2004 The 10/30 reg. oil breaks down quick. And is very thin, just like water. Do not falllll for the cleaver commercials. Thin how? It is a 30 Weight Motor oil like every other 30 Weight motor oils. greaseygracy I would like to know how you formed your educated opinion. Let me guess you are an mechnanic? I am sure you don't have any idea how an chemical reaction is formed.

The same Penzoil shills, flooding BITOG with raving pro penzoil posts, are also here giving it undeserved high marks. They are over at BITOG, right now, whining about this site too.

Penzoil shills are all over the net pushing their product and advertising the "big penzoil 2fer sale".

Penzoil is at best not harmful. But right now it is highly over rated that's for sure. The wax buildup claim is crap though. You would surely be far better off with Castrol Syntec or Mobil1 Synthetic.

Penzoil is responsible for legitimising the labeling of Group III semi syn as "full synthetic", and don't even forgive them for that!

I rate Pennzoil a 5...........it's a 2 for one product. You get oil, and then, when your engine dies from all the wax buildup, you can make candles. Saves you a heck of a lot in the long run.

Man oh man. Some of you need to educate yourselves before posting. At the least quit utilizing 25 year old "rumors"... Pennzoil is a fine product and works well under most driving conditions and most motors made today. Add packs and basestocks are average and should last the average driver 4-5K oil change intervals no problem. All in all a great value compared to other overpriced oils you can find on the shelf at your local store. I am speaking of the plain jane yellow bottle stuff. Now the Pennzoil Platinum is really a great value and shows excellent wear numbers even when compared to the "Top Shelf" synthetics that are sometimes double the price.

First, off I, Mike, am the REAL ToyotaNSaturn. I love Bob's site and find it one of the most respectable spaces on the 'net.

To whoever the 1st poster was with MY handle at Bob's site, please identify yourself, or at least, your IP address so I can cross reference you.

And by the way, I have TONS of Pennzoil in my stock...Platinum 5w-20, Platinum 10w-30, LongLife 15w-40, SJ Synth 5w-40 (thanks to Johnny!), 5w-20 & 5w-30 dino.... I think it's the simply at the top of the available OTC oils today.

Two thumbs-up to Pennzoil!!!

Two thumbs-down to whoever used my BITOG login name.

I have to rate the people at bob is the oil guy about the lowest of the low. They are a bunch of corporate shills thet push products. Pennzoil is the best of the best product.

XOM, makers of Mobil 1, is based in New Orleans. Is that why dc ignored katrina? My oh my the oil biz is ruthless.

Pennzoil = SHELL OIL Co = guess who.


Hint: Rhymes with tush.

Pennzoil is great!!! I will never use anything else in any of my engines. Even the lawn mower uses Pennzoil, and has ran better since I began its diet of Pennzoil.

Pennzoil has flooded the bob is the oil guy site with shills pushing their garbage. The same jerks have been spreading unsubstantiated rumors dissing Mobil1 too.

Man I hate corporate sellouts.

I also believe pennzoil is junk i have seen what it does to motors on the inside its not pretty.. i recommend royal purple line of oil..www.royalpurple.com

I'm not particularly a fan of Pennzoil. My dad said his trucks ran like crap on this oil, people complain about buildup, and also some jugs look like they've got elements of something in the oil when you open it new. Now mind you I have heard good things about their Synthetic oil. And an auto dealer I know says the Yellow Bottle Conventional is pretty descent and that they use it in all their cars & motorcyles but that's prob cuz it's cheap ($$$). My mom has had it in her van every prob 1 out of 3 oil changes becuase we take it wherever to have the oil changed becuase its hard to change due to spoiler & running boards, the engine still runs well after 9 years so it must work to a legal standards well, but over and above other oils I somehow doubt. I would rather use it if I had to choose between cheap crap like Nugold or the Walmart Tech 2000 or other low priced oils if I was in a pinch. But as far as I'm concerned Pennzoil will never touch my engine. [Biggest thing is O&F-5kmOr3m]

None of the comments below warrant any merit, or attention. Pennz is fine oil, and will serve you well. It does NOT cause a sludge build up, or a waxy residue. Only lack of maintenance does that. Use Pennz with confidence, change it every 4-5000 miles, and be happy. Check out bobistheoilguy.com for detailed analysis of all Pennz products.

ive built engines for 25 years and any engine i have seen that has ran on pennzoil has been black stained and waxy usually we took apart these engines because of malfunction. next time you buy if (if you do) notice how dirty of an oil this is. my sugestion is use valvoline all the time and you will never have these problems. pennzoil is even more expensive! its terrible!

Very simple terrible oil-that sums it up

Well I will take you word for it that it's bad...but used to run this in my cars and maybe I was just luckey that my honda went 150K miles and was still running ok when I sold it. I still going to rate it ok since in my esperience nothing bad happened, but then again was it luck?

Pennzoil sucks so bad i could develop an oil right now that is better than it. I know a friend who used their conventional oil twice. During the second run with it he noticed something terribly wrong with the engine. He is also mechanic so he took the engine apart and was shocked to see all of the wax build up in the intake and valves and pistons. We both tell people NEVER to use Pennzoil, its not a suprise I rarely hear anything good about Pennzoil, I hear that the new Platinum is pretty bad too.