What oil do you'll recomend running in stock 1992, 502 carb. motors.

I have always run RedLine 40wt race with just enough of their 10-40 to get some additives per their suggestion.

Pachangia thanks for the info.

I prefer the Merc oil myself. Been told it has additives to fight condensation more than regular oils. Don't know fact or fiction thou

Mobil One....

Change the oil + filter every 10 hours...

It's the Life's blood of your motor.......

If your motor has Roller Cam setup use Merc 25W-40 oil. If it has flat tappet cam setup use Amsoil 20w-50. Synthetics in a stock roller setup will allow the rollers to slide on the cam instead of roll and wears flat spots in the rollers. This applies only to stock motors using stock valve springs. Raise the spring pressure and synthetic is the way to go. BTW ... Merc oil has produced the highest oil pressure numbers in any motor that I have ever seen. Think it holds its consistency well under extreme use.

- Vinnie

I saw some roller rockers get flat spots on the roller tips...the guy was using syn. Mobil 1. in his 525SC's

The synthetic oil is way to slippery to use with stock components. The rollers in the rocker tips were not rolling ... instead they were sliding on the valve stem.

- Vinnie

Stock motor, use Merc.

Look up some past threads with "Hydrocruiser" he is da man with oil knowledge. Very informative.