04-21-2009, 03:56 PM
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CC Member
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Join Date: Nov 2003
Location: New Britain,
CT
Cobra Make, Engine: Size 10 Feet
Posts: 3,032
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Not Ranked
The only time I would use a single-weight oil is for an industrial engine or a compressor. Multi-viscosity oils work much better than 30 years ago, and with the tight clearances in a street engine, you risk running dry until the oil gets up to working temperature. Cold 50W will also strain the oil pumping system at low temperatures because of the ultra-high backpressure from restricted cold flow. |
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