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Re: Just drive it and see I guess Posted by sam96CS [Email] (#852) [Profile/Gallery] (more from sam96CS) on Tue, 6 May 2014 22:11:56 In Reply to: Just drive it and see I guess, 85turbosled, Mon, 5 May 2014 22:56:35 Members do not see ads below this line. - Help Keep This Site Online - Signup |
It is the flow of oil that lubricates and not the amount of oil pressure. You have more pressure but less flow when the engine is cold, and that is the reason why a lot of engine wear occurs during warm-up.
You'll make warm-up even harder on the engine if you use 20W50 long term.
I think the numbers that Anders posted are for the B235 engine, not for your B234 engine. With a warm engine you won't get above 40 PSI at rpms >4,000 in a B234 engine. What makes the difference is the strength of the pressure relief valve's spring. The B235 has a longer, stiffer spring, so more pressure is required to push the pressure relief valve into the open position. You can replace your B234 spring with a B235 spring, and you probably should if your driving is spirited. The B235 spring costs maybe $5.
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