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Yeah I thought about going the VR1 route but I change my oil once a season and VR1 is a short interval oil. Which means it is low on detergents and is intented for short term use.

Well I have decided what oil to use in my 1989 OMC 5.7 cobra and here it is. http://www.valvoline.com/products/consumer-products/motor-oil/conventional-motor-oil/1 in SAE 30. I will add 1/4 oz of cam shield per Qt. Any suggestions or comments?

How's about this stuff? I believe starbrite the people that make the fuel stabilizer makes this oil for west marine. http://www.westmarine.com/webapp/wcs/sto...;classNum=10436

How's about using Cam Sheild additive? Anybody try this stuff?

I am a little confused as to which oil to use in my 1989 OMC Cobra 5.7. The book calls for straight SAE 30 which I can find. But I believe this engine has a flat tappet cam setup. And it is my understanding that newer oils don't have the zinc content that should be used with the flat tappet...