My 1966 Corvette manual specifies 10w30 engine oil.(327cu 300hp) Can I use HD 30 instead?I live in southeastern Pa.and drive very little, especially in winter.

5

Asked by Sep 22, 2013 at 07:32 PM about the 1966 Chevrolet Corvette Convertible Roadster

Question type: Maintenance & Repair

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3 Answers

241,665

From Castrols swebsite. "Castrol HD 30 should be used in ambient temperatures above 40 degrees". Is it going to cost you less money? I don't see why you want to use it. Any good 10W-30 will be fine. Your going to change it once a year anyway.

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I always go with what the manufacturer recommends. No matter how old. My '03 S-10 pick up with 278,000 miles still gets 5W-30. Runs just fine with good oil pressure, hot or cold. HTH. -Jim

160

.. I would say it depends on the overall health of your engine.. If it is using or leaking a little, I would at least use 10w40,that's a good all season oil... I have changed my 63' 360 horse F.I. original over to 20w50 synthetic and have not had any cold start problems, although, I never hit the gas, as I'm cranking, until I see the oil pressure coming up...I've forgotten how old my battery is and the car still does 20+ mpg highway.. HEY," If it ain't broke, don't fix it " !

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