[christians1600]

1987 32ft gulfstream chevy 454 engine 49,000 miles, i changed the plugs today and noticed a tad bit of oil on th back 2 plugs, nothing major the engine runs great no smoke only if it sits and then a puff at start up,should i worry and should i change my oil to another weight?? i noticed another forum 454's at 50,000 miles the back lifters get starved for oil.......just trying to stay ahead of any problems..thanks