15-40 Rotella versus Straight 40

[Mark E.]

Re: 15-40 Rotella versus Straight 40

I guess I'm living a charmed life. My Mobil 1 fed LS5 only had two leak issues: Valve covers (which I finally conquered) and the oil drain plug (which tend to leak on Chevys with any type of oil).

[Dick W.]

Re: 15-40 Rotella versus Straight 40

I guess I'm living a charmed life. My Mobil 1 fed LS5 only had two leak issues: Valve covers (which I finally conquered) and the oil drain plug (which tend to leak on Chevys with any type of oil).

LS engines are normally as dry as a "dust fart". They were designed for synthetic oils

[Patrick H.]

Re: 15-40 Rotella versus Straight 40

LS engines are normally as dry as a "dust fart". They were designed for synthetic oils

They will leak at the drain plug if you don't replace that rubber gasket/insert with each oil change.
Ask how I know.

[Joe L.]

Re: 15-40 Rotella versus Straight 40

They will leak at the drain plug if you don't replace that rubber gasket/insert with each oil change.
Ask how I know.

Patrick------


I replace it (GM #14090908) every oil change and they still leak.

[Dick W.]

Re: 15-40 Rotella versus Straight 40

They will leak at the drain plug if you don't replace that rubber gasket/insert with each oil change.
Ask how I know.

I use Loctite PST on the oil pan drain plug threads and stop the leaks. Our Yukon has 100,000 miles on it and not even a damp spot anywhere.

[Joe L.]

Re: 15-40 Rotella versus Straight 40

I use Loctite PST on the oil pan drain plug threads and stop the leaks. Our Yukon has 100,000 miles on it and not even a damp spot anywhere.

Dick-------


I've tried that, too, after I scrupulously cleaned the threads in the pan and on the plug. Didn't work for me.

[James G.]

Re: 15-40 Rotella versus Straight 40

The only Corvette I have owned that does NOT leak is my current 96 LT-1. Every C-1 and C-2 leaked oil.

[Mark E.]

Re: 15-40 Rotella versus Straight 40

LS engines are normally as dry as a "dust fart". They were designed for synthetic oils

Dick,

To clarify, I have an LS5 454 which is a first gen big block, not an LS engine.