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Old 03-20-2018, 03:03 PM   #1
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1999 f550

I am getting ready to change the oil and found I have 6 quarts of 20W-50W STP brand oil which need to be used. Would it be a problem using it in my 1999 V10 Triton?

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Old 03-20-2018, 03:08 PM   #2
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HUM... Thats fairly thick, I used 20w50 in my airplane, it was an air cooled engine.

In my MH, depending on outside temperature, .. I'd probably use 1/2 of it mixed with 5w30.. i.e. use 3 qts of the STP and 4 qts of 5w30..

1999 Fleetwood Southwind 35S (Ford F53 6.8L V10 4R100) - Toad 2003 Saturn Vue.

It won't do MACH 2, but I can get a sandwich and take a pee.
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Old 03-21-2018, 01:14 AM   #3
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Save it for the generator in the summer. Way too thick!
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