Oil viscosity

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Oct 17, 2016 | 08:10 PM

#16

john griffin

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Joined: Jun 2003

Posts: 114

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From: South-East Tx.

Well my old 2004 has 160.000 miles, sorry I'm not looking for 25 mpg, and I'm old school. That 5.4 uses oil pressure for things other than just oiling, I use High mileage 20W50, motor is as quite as a flat head V8. It's mine and paid for, sold my 1988 F-150 with 497.000, guy I sold it to wrecked it but was still running

Oct 17, 2016 | 08:48 PM

#17

steve(ill)

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Joined: Jul 2005

Posts: 11,931

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20w 50 is a little thick for most areas john........ your in south Texas and can get away with it ............ I still think that's pushing the limit.

Nov 6, 2016 | 09:52 PM

#18

442w30

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Joined: Jun 2005

Posts: 375

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If you want to know how long you can run between oil changes send oil sample to Blackstone. In a week or so you will have all the information about your engine health and oil life. Cheap insurance and will let you know if something is going south.