Amsoil oil change intervals?

I run Amsoil in my F-150 with 5.4 that I use to tow and daily driver. I Change oil and filter every 7,000 miles. I don't believe in the extended intervals the companies advertise. Oil gets contaminated whether it's synthetic or not from normal operation.

I still change my AMSOIL every 3k, but it takes about 2 years to reach it... I wind up changing it about once a year now.

Tim

i have seen 3 different vehicles blow up because of this.i doesn't matter what oil you run,dino or synthetic,i would change the oil every 3 to 5 with dino and 5to7 with synthetic.

All oils, IMO, should be changed in 3000 miles intervals, because oil has detergants in it, which cleans the engine. You can't wash a dirty floor with dirty water.

35,000 miles? That's a lot of miles before an oil change. I was told 6k with Amsoil. Oil is cheap insurance to me, so I change it every 3k miles. When I had Amsoil in my car, I chaged it between 4500-6000.

there are 2 different models of Amsoil, 7500 series and 2000. the 7500 last 7500 miles, and is cheaper than the 2000 series. The 2000 series last 25,000 miles or one year. Now my recomendation is don't leave it in there 25,000 miles if you beat the crap out the motor.
I have two Amsoil dealers in my neighborhood, and one is my next door neighbor.

some of the diesel guys do run synthetics for considerable OCI's. a UOA is the ONLY way to know how the oil is doing and how much longer it might alright for.

synthetics have much better G-VII, additive and detergent packs, hence being able to run longer.

I'm with Hissin - Amsoil would likely tell you to change the filter every 3-4K, and to pull a sample and send it in for analysis to determine when the oil needs to be changed. My brother routinely gets 15-25K on Amsoil in a Powerstroke diesel before analysis indicates it should be changed. Of course, those have a much better filtration system, and they hold a boat-load of oil. Color of the oil or mileage has no predictive value at all on a synthetic's ability to protect/lubricate.

Me - I buy the least expensive synthetic I can find (Shell Rotella T for diesels) and run it in my wife's Bimmer as BMW specs synth for that engine. We change the filter every 3K, and the oil every 6k. Her oil change indicator (looks at temps, miles, revs, etc.) recommends a change every 10-12K depending on how it's driven. In mine I use a quality dino oil, or an inexpensive synth BLEND (on sale) and change oil and filter every 3K.