Chevy 350?

Is it ok to put straight 30 weight motor oil in a chevy 350 small block

7 Answers

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  • 6 months ago

    yes but make sure it is detergent and not NON DETERGENT.. But depends on year of manufacture, etc.. some 350 use multi grade oil some of the older ones use 30 and also depends on where you are... 30 is really like thick honey when it is cold and your engine could get damage waiting to warm enough for it to be circulating well threw the oil ports.

  • Ron
    Lv 7
    8 months ago

    50 years ago it was

  • Anonymous
    8 months ago

    OK during the hot summer months but a serious NO in wintertime climates, SAE 30W oil will cause all the hydraulic valve lifters to collapse and fail in sub zero temperatures. Use SAE 5W-30 multi-grade oil and you should be fine. Winter grade oil would be SAE 5W-20 when temperatures hit -25F and straight SAE 30W or 10W-30 for a hot climate zone.

  • Anonymous
    8 months ago

    Depends on precisely which 350 you're referring to dipstick. The 350 has been made since 1969 and has evolved through 15 versions, not all of which use the same grades of oil.

    FAIL.Try again. 

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  • 8 months ago

    It's too thick when cold. That's why motors these days use 10w,  5w or even 0w cold rating oils, so they circulate faster, such as 10W-30, 5W-30 or whatever.

    Initial oil circulation is very important to the life of an engine and to hydraulic valve gear, for instance, and thinner oil when cold can also mean it's easier to crank.

    Use whatever the makers recommend.

  • Andy C
    Lv 7
    8 months ago

    Should be fine.

    Depending on the clime.

  • Anonymous
    8 months ago

    No.  It will cause a hard start in cold weather.  A 10W-30 oil is good, 5W-30 even better.

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