I have been thinking ( again) should I change over to using Synthetic Oil in the 1987 4.1 ot leave the connventional oil in it ???
some of my friends say change over you won't have to change oil as often and the engine will run cooler, while some guys say stick with the old and just change every 5,000 kms with new filter
I was always told if the engine has never been rebuilt don't change because the seals will leak the new thinner oil ??????
what to do ?? what to do ????
your thoughts
some of my friends say change over you won't have to change oil as often and the engine will run cooler, while some guys say stick with the old and just change every 5,000 kms with new filter
I was always told if the engine has never been rebuilt don't change because the seals will leak the new thinner oil ??????
what to do ?? what to do ????
your thoughts