Quote:
Originally Posted by johnmyster
Cavitation will happen at -15 psia.
No, but flow is pressure dependant.
You have to have sufficient pressure to lubricate all parts. I have to have sufficient pressure to keep my lifters pumped up.
And while your owner's manual may tell you what weight of oil to use, the engineers didn't really care about bearing clearances at 150k miles. There are a few valid reasons to change based on use, climate, and mileage.
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You are correct. High mileage, high load engines live in a different environment than econoboxes. There is an argument for all opinions. One thing we tend to lose sight of is...folks who neglect their oil level, change life, oil source tend to go just as far...or for just as long as the more fastidious of us. Which says what about the dino vs. synthetic argument? Or the 3K vs. 30K change? I STILL maintain "oil is oil". Clean may be a personal choice...but I feel better about "clean & cheap"!
This tread is long enough, yes?
