Recent content by PDX_Matt

Originally Posted By: FZ1 More likely to leak with syn. What facts do you have to backup that claim?

Originally Posted By: expat "I have heard this from a lot of places, not just about the 620 but older cars in particular. Synthetics are supposedly "thinner and more slippery" causing leaks in older cars." I think a 10w-40 synthetic is just about as thin as a 10w-40 conventional. How do you...

Long time reader of the forum but new member. This thread is brought on by something that I've been curious about for awhile. Recently purchased a 76 Datsun 620 pickup with roughly 115k miles on the original engine. I am also on a Datsun forum where I am logging the progress with the truck. A...