While having an alignment on my 78 Toyota pickup, it's second one, the shop next door offered to do a safety inspection for free. So, I thought I'd see what their sales pitch would be. I've owned the truck since new, it has 578 thousand miles with a top end rebuild at about 300 thousand miles. I was told the truck was in generally good shape but with that many miles on the engine it was unsafe and might fail at any time due to metal fatigue. It needed a replacement engine. He told me I was lucky because I was doing the work myself, not using a professional mechanic, using the wrong oil, Castrol 10w30, and a toilet paper filter, a Frantz for both oil and gas that would not last long before it plugged up the oil passages. I'm still waiting for that last problem to develop, nothing so far. He said I was doing pretty good for an old guy but it's time to turn the work over to a real mechanic. Here is my question. Are the members of this forum tolerant of diy people that do absolutely everything themselves, that drive 'em till they drop, don't have fancy vehicles and lots of money?