I've got to say I agree with Cliff. I had a beater Suburban in Doha with a flat tappet Big Block. 200,000 miles or so. Original camshaft. Never an additive in its life. Whatever cheap oil.
I think the big components are likely to be:
* worse QC in the cams and lifters now that these are not in volume OEM production
* fast ramp profiles along with
* heavy springs
* shade tree rebuilds (like mine) that don't start right up and crank for a while until you discover your timing is 180 degrees out or you aren't getting fuel
I used to always tip in a can of STP with every oil change in Qatar. In the UK it's just too damned cold for me to feel right adding that honey to things and I just use the modern 5W-30 that goes in the modern cars. Good oil should be good oil. And depending on climate thin oil that gets to the part is always going to be better than thick oil that doesn't pump on a cold start.
Sam
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Sam Agnew
Where you come from is gone; where you thought you were going to, weren't never there; and where you are ain't no good unless you can get away from it.
Ministry - Jesus Built My Hotrod
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