How long are you baws running synthetic between changes

When the oil % gets to 5%.

5k miles

when the truck says to change the oil. Usually ends up being about 10k.

I live close to work so I do 5k.

I also pull some. Not heavy but still.

If I was further I'd do 7500

Between 10%-15% on the truck

When my truck tells me to change it, usually about 10k miles, almost all of them highway.

With the new engine in my Tundra, I'm getting it changed every 5000 miles.

I think I’m running a blend and I change it like I always have 4k

308,000 miles and going

On my F150 with 2.7L ecoboost I change the oil every 5K miles. I do this cause a 25+ year ford mechanic told me NOT to listen to the owner's manual. Said that turbo motors are harder on everything. Oil, spark plugs, etc.

On my old 4Runner with the 4.0L i do a complete oil change every 10K miles.
With an oil filter change and top off oil every 5K miles.

quote:

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I do this cause a 25+ year ford mechanic told me NOT to listen to the owner's manual.

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I think most manufacturers set their maintenance schedule to incur the least amount of cost that will get the vehicle to 100k miles. A lot of people sell by then so it doesn't matter.

Just as an example, Mazda claims their transmissions are "sealed" and don't need any service at all until 100k miles. There is no lubricating fluid on the face of the planet that does its job as well at 100k miles as it did when it was new. That's just bullshite designed to keep your maintenance costs low.

There are plenty of subject matter experts on Youtube that can give people more realistic service intervals if they don't happen to know an honest mechanic like you did.