While we're talking about oils...single weights?
What are everyone's opinions on running single weight oils? I figure they have less additives compared to multi grades. I'm wanting to run the cleanest oil possible in my new 400 when I have it done. Are single weight oils a thing of the past? Do they make single weight synthetics? What would be the advantages/drawbacks of running say 30w in the summer and 5w or 10w in the winter?
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