What Oil is the best?

Royal Purple, 146k on my dsm and hasnt broke down once.:goodjob:

Mobil1 hasn't sold full synthetic in nearly a decade, it's all a conventional synthetic blend ;)

After Mobil1 sued Castrol for selling a Group III oil as full synthetic (Group IV) and lost they too begin producing the PAO crude oil based blend and selling it as fully synthetic. The Better Business Bureau declared since the oil has similar properties & performance they can call it full synthetic.

The catch is Mobil1 never told their customers yet continued to sell Group III oil at Group IV prices.

*NOTE*
I forgot to mention this ONLY applies to the US market, full synthetic in any other country are indeed fully synthetic.

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Originally Posted by GTScoob

German Castrol 0w30 or Shell Rotella T 5w40 are all that I'll ever put in my motors as far as synthetics go. Castrol GTX is as good as it gets when it comes to dino oil, and its almost always on sale between Wal Mart, Autozone, and Advance.

Mobil 1 is shit, it used to be good but their standards have dropped through the basement in recent years. If you're going to use it, go for the high-mileage synthetic, its a lot more durable than the normal oil. The only thing worse than Mobil 1 is Royal Purple.

There have been a bunch of good threads on here about oil. Motul 8500 is great as is any Amsoil. I really wouldnt ask for oil advice on here, go to a track and see what the real racers are using. I doubt you'll hear many of them mention any positives about Mobil 1 other than that its cheap and readily available anywhere (so is the Rotella T).

Check out the Bob the Oil Guy website and if you're really worried about your oil send a sample to Blackstone Labs every few oil changes to see if your motor is still in tip top shape. There are a lot of test results on there, look them over and see if you still want to run Mobil 1, I dont. You want an oil that keeps its shear weight up over the entire lifespan of the oil, not Royal Purple which starts as a 5w30 and after 3K miles has a shear weight less than 20.

A better question would be, who is using good oil but running it through shoddy Fram filters? Napa Gold and Pureone are what I've used with great success.

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You my friend are the most intelligent person in this thread :goodjob:

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Originally Posted by speedminded

Mobil1 hasn't sold full synthetic in nearly a decade, it's all a conventional synthetic blend ;)

After Mobil1 sued Castrol for selling a Group III oil as full synthetic (Group IV) and lost they too begin producing the PAO crude oil based blend and selling it as fully synthetic. The Better Business Bureau declared since the oil has similar properties they can call it full synthetic.

The catch is Mobil1 never told their customers yet continued to sell Group III oil at Group IV prices.

Check out the Bob the Oil Guy website and if you're really worried about your oil send a sample to Blackstone Labs every few oil changes to see if your motor is still in tip top shape. There are a lot of test results on there, look them over and see if you still want to run Mobil 1, I dont. You want an oil that keeps its shear weight up over the entire lifespan of the oil, not Royal Purple which starts as a 5w30 and after 3K miles has a shear weight less than 20.

A better question would be, who is using good oil but running it through shoddy Fram filters? Napa Gold and Pureone are what I've used with great success.

You my friend are the most intelligent person in this thread :goodjob:

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I agree 100%. I will never run Mobile1 or Royal Purple here. Not sure if the Castrol or Havoline from Advance is any better but it has done us just fine. And as far as Fram filters go, they use to be a really good filter back in the day but I steered clear of them years ago when I had one collapse.

The only reason I offered my opinon is because we drive 200-300 miles a day and they are hard miles along with our drag racing hobby with several Nitrous applications and a few dozen Mustangs in the crowd. I am by far a professional but I will stick to what I said previously.

Best oil for what?

mobil 1 full syn

Amsoil FTW!

I used to run mobil 1. now i just use napa shit bc i get it free. When i start buying oil id like to try that shit that bizimoto came up with. cant remember the name of it but i used it to lube my bearing when i assembled my engine and i liked it.

Royal purple is not good for high milage engine. my friend put it inhis prelude and it started smoking. i think bc when it gets hot its viscoity drops too low and u get blow-by. u get power gains bc it doesnt bond to anything is my theory.

If u want to clean ur engine, just drop ur oil level one quart and replace it with trans fulid. Shit comes out blanging. Old master tech trick i learned from my professor.

^^ or put a quart of ATF in your gas, but do this before a tune up.

I use Mobil1, with a blue honda filter every 2000 miles.

im getting rotella 15w40 for my next oil change..

least expensive synthetic oil and i've heard good things...

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Originally Posted by Humphries

im getting rotella 15w40 for my next oil change..

least expensive synthetic oil and i've heard good things...

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y did u bring this back from the dead.

because i am a noob.

i heard castrol edge is good. they have it in Fast and Furious. :) ive never used it. i buy watever good synthetic is on sale at advance.

edge is working real well for me:D previously used royal purple