'66 LeMans Motor Oil - Pontiac GTO Forum
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post #1 of 5 (permalink) Old 05-18-2013, 12:42 AM Thread Starter
 
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'66 LeMans Motor Oil

What kind of motor oil should I use in the '66 LeMans I've acquired with a 326 engine?
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post #2 of 5 (permalink) Old 05-18-2013, 10:32 AM
 
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slicker than okra

Well, lessee. If'n ya live in a hot Southern State, ya might want to run slightly thicker oil, say 10w40. I always would run 10w30 in colder climes. I'm not too hep on any synthetic oils, though. Never really used them. Not too sure about running other kinds of oil in an old engine, either. Never did.
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post #3 of 5 (permalink) Old 05-18-2013, 11:59 AM
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It's a little pricey but I run the Valvoline VR1 Racing oil~ 20W-50. It has the high zinc formula to protect the push rods and flat tappet lifters.
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post #4 of 5 (permalink) Old 05-18-2013, 04:52 PM
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Garage
There's a lot of information about oil available here:
- Bob is the Oil Guy

Don't go there unless you've got several hours available to read and study.

Bear

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Springtown, TEXAS
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post #5 of 5 (permalink) Old 05-20-2013, 09:08 AM
 
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a good quality 10w-40 with a bottle of ZDDPLUS would be fine. what did the previous owner use?
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion

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