Synthetic oils & engine magnets
OK, Ive got an '86 GMC half ton truck w/ a 305ci carberated v8, and I want it to last me another 5-10years with out having to rebuild the motor. Its got over 200K miles and still runs fine, at 60mph Im getting 15~18mpg. Will changing my oil type to synthetic blends make any difference as far as lasting longer? Also, would i benifit any now by using magnets in the oil filter and/or oil pan? Or is the damage already done?
If synthetic blends will make a difference, which brand is best for the money?