To Slick 50, or not to Slick 50? That is the question.

Hmmm... And how did that valve or lifter get stuck in the first place? Lack of proper lubrication with something like Valvoline or Castrol GTX.

Also, on an engine with "hours" Marvel or Wynn's will disolve some of the carbon deposits and cause piston blow-by and burning oil.

Don

My cat, Tigger has eaten 1000s of meals and drank water from a Teflon lined bowl for years. He does act squirrelly at times though. Could it be the Teflon? I would never put my beloved cat in danger like roasting him at 500

Hmmmm... right back at ya! Now you've got me confused: do you or do you NOT like Valvoline? Compare your comment above with one of your earlier posts--

"We sold our '97 OB with 60K miles and never had a problem. Avoid additives and stick with Valvoline--5-30 from 0-100F. I take it back, I did have..."

???

Sticky lifters MAY be the result of improper lubrication in any engine design, but using hydraulic lifters in a flat engine seems to have caused more than average numbers of problems since at least the days of Corvairs. I'm not sure anyone's ever really solved it 100%.

Rick

Hmmm...Hmmm... back at you. Sorry for the confusion.

I used Valvoline for years in my AJS single 500cc thumper with no problems, even while laying it down and sucking sand in the carb. I used Castrol GTX in my '88 Carrera and the local Sub dealer does too.

Didn't know that, Rick. I didn't even know the valves were hydros in the Sub; they definately weren't in the Carrera. At 80K mi you could still see the factory hone marks in the cylinder walls when the new buyer had it taken apart for pre-purchase exam. That sold me on Castrol GTX.

I use 20W-50 Castrol in my '87 Subaru Hatchback and the engine has no problems and I run it very hard. Of course you will want to use a lighter weight oil in colder weather. Anyway the engine has 160k miles on it and I expect it to run another 160k or more on Castrol. Iam not a believer in Slick 50 or any other synthetic oil because I believe that oil should be changed every 1500 to