Join Date: Feb 2008
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I've started using Amsoil 15W-40 in my truck. The service life is 25,000 miles or one year. I do probably around 12,000 miles a year so once a year is how often I would change the fluid. Does this stuff honestly last this long? Running 12,000 miles on one fluid change really enough? I've done one year on this stuff and I'm on my second. I change the filter halfway through.
97' F250 7.3 Powerstroke (Daily driver/tow rig)
Mostly stock, many wants not enough money.