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Originally Posted by serialk11r
Maybe this is a horrid idea, but how about reducing the heat capacity of the cooling system?
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It'd also cool off a lot faster.
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Also, I suspect that engine oil has a lot to do with short trip economy,
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It sure has.
I can see (instant fuel consumption), hear and feel the difference between 5W30 and 0W30 in winter.
Less fuel use in the first miles, and it runs quieter and smoother.
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Supposedly not all 5W or 0W are equal, a 5W-20 is quite a bit thinner than a 5W-30 when cold.
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5W should be 5W (though there is some variation within specifications) - as it's the cold rating of the oil.
20 will be thinner than 30 when hot.
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0W would be better but I have an oil burning early 1ZZ so I'd rather not use an expensive oil
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If it's already burning oil, a thinner (lower hot "weight") oil will only burn more oil.
I wouldn't go 20 if the engine isn't designed to take it.
I might try it in Hägar, as I don't care about the bugger anymore
Going down to a good quality 0W oil in winter shouldn't be much of an issue.