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New Edge Cobras
99 cobra oil pressure at idle?
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<blockquote data-quote="01yellercobra" data-source="post: 15998273" data-attributes="member: 35549"><p>The reason the 5w-20 was specified was trying to hit economy standards. The engines were identical in 99 and 01, but the 99 had 5w-30 recommended. The 5w-20 was to help mpg's. </p><p></p><p>I was told a few years ago by an engine builder that the passages in these heads are too small for a 40 weight oil. So I've never run anything heavier than 30 weight. Even in my blown big bore stroker. Aside from the rings sealing so well they sucked the oil pass the guides on decel I never had an oiling issue.</p><p></p><p>But then I believe the new GT500's and track pack 5.0's require something like 15w-50. Different heads so take it with a grain of salt. </p><p></p><p>And last but not least. Anyone that's been around these cars any length of time knows to run 7 quarts of oil because of what collects in the heads. Someone did a test on here many moons ago and it took about 9 quarts to even get close to the pan rail. So the extra quart won't hurt anything.</p></blockquote><p></p>
[QUOTE="01yellercobra, post: 15998273, member: 35549"] The reason the 5w-20 was specified was trying to hit economy standards. The engines were identical in 99 and 01, but the 99 had 5w-30 recommended. The 5w-20 was to help mpg's. I was told a few years ago by an engine builder that the passages in these heads are too small for a 40 weight oil. So I've never run anything heavier than 30 weight. Even in my blown big bore stroker. Aside from the rings sealing so well they sucked the oil pass the guides on decel I never had an oiling issue. But then I believe the new GT500's and track pack 5.0's require something like 15w-50. Different heads so take it with a grain of salt. And last but not least. Anyone that's been around these cars any length of time knows to run 7 quarts of oil because of what collects in the heads. Someone did a test on here many moons ago and it took about 9 quarts to even get close to the pan rail. So the extra quart won't hurt anything. [/QUOTE]
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99 cobra oil pressure at idle?
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