Synthetic for an older motor?
#1
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Synthetic for an older motor?
I'm trying to get an opinion on using synthetic oil for my 1989 454mag with over 500 hours. Teague had reccomended using Amsoil 20w-50 racing as a synthetic for marine but is it a good idea for an older motor that's never had it?
#2
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Synthetic is better, period. For a boat that gets very few hours, though, you're changing oil due to combustion impurities, not because of the oil breaking down.
For a stock motor in a low-hour boat, I say go with a good conventional oil and change it often.
For motors that get a lot of hours, or high performance stuff that is stressing the original parts, then synthetic every time.
For a stock motor in a low-hour boat, I say go with a good conventional oil and change it often.
For motors that get a lot of hours, or high performance stuff that is stressing the original parts, then synthetic every time.
#4
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No disrespect, but you don't have any idea what you're talking about. Yes you need Zinc, but that doesn't mean synthetics don't have it.
#5
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One of the highest zinc / phosphorus levels among the commonly available oils is Mobil 1 15W50 (1200 ppm zinc). Most conventional oils now have less than 800 ppm. M1 15W50 is run in huge numbers of flat tappet engines with no issues. I own a few of those engines.
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Yeah, and my AMSOIL Series 2000 Racing Oil had more than that after 60+hours of use.
#8
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The extra cost for amsoil full synthetic is alot cheaper than broken engine parts
#9
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Mobil 1 makes lots of oils - some are lower zinc, but 15W50 has plenty of it. So does V-twin, and several oither of thier oils. They publish the levels on the website.
BTW, Mobil 1 is not a conventional (ie, dino) oil, it is a full synthetic.
BTW, Mobil 1 is not a conventional (ie, dino) oil, it is a full synthetic.
#10
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