Quote 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
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.