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Thread: redline RPM for buick 340

  1. #11
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    1155, I have updated the post. It's what I get when my kids walk into the office while typing. That's what I was afraid of with the 15w oils but regardless I'm hearing stay clear of a few marketed brands.

    Larry70gs, I've been thinking the same thing but looking at how oils perform in stressful heat matters because I know foaming will kill quickly too.

  2. #12
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    Quote Originally Posted by Modernfuse View Post

    Larry70gs, I've been thinking the same thing but looking at how oils perform in stressful heat matters because I know foaming will kill quickly too.
    Synthetic oil withstands heat way better than conventional oil, and it flows better in the cold as well. Keeping the oil away from the crank goes along way in avoiding foaming. The problem with diesel oils is diesels are low RPM engines, so they may not have the anti foaming additives present in racing type gas engine oils.
    Larry

    1970 GS455 Stage1 Race weight 4025 lbs.
    TSP 470, 602 HP, 589 TQ
    MT headers, Gear Vendors Overdrive
    Best E.T. 11.54 Best MPH, 116.06
    1998 Riviera SC3800

  3. #13
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    thanks for the good info.

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