acadianbob

This is not meant as an affront to your findings . . BUT . . . the local Ford dealer told me that they had an Ecoboost engine in for the dreaded timing chain issue. The owner had been using Amsoil and the extended intervals. He said the timing chain was totally full of "oil gunk". So, my question is, does an oil analysis really tell the full story? If the oil is doing its job, shouldn't the timing chain have been clean?

jonbar87

Awhile ago, I did have a sample of virgin Amsoil along with a used sample analyzed back when I tested the oil in my wife's Honda Pilot. I'll copy/paste the two beside each other in Excel and post it once I get home.

jonbar87

That's why I became a dealer. I get it at dealer cost and even with shipping, it's still cheaper than say, Mobil 1. A lot of dealers try and sell the preferred customer package to their customers and that right there is an extra $10. When I sell it to my buddies, I sell it to them at dealer cost so they pay exactly what I pay. If you need some, hit me up offline (don't wanna get accused of trying to advertise here) and I can get you some at dealer cost without the extra $10. I never try and upsell it to my customers cause I wouldn't appreciate it if a dealer tried that stunt on me.

redcelica

Im not sure I would adhere to the extended intervals on a turbocharged motor. Since oil is used to lube the turbos, and if the owner did not let the oil cool before shutting the engine down, it would build up burnt oil sludge no matter how good the oil is.

Wannafbody

I'd like to see a TBN number. Some Amsoils start at near a 12 TBN but at 22K I'd suspect the TBN to be pretty much gone. Heck even in my track Miata which only sees a 1000 miles or so a year, I change the Amsoil yearly.

Vhob99

5.0nly

Change the oil with any good synthetic every 10k miles and stop stressing. My current ecoboost has had non-synthetic in it since new and oil changes when the oil life monitor tells you to. 200k - no issues.

antony1103

I'd be curious of your TBN at that interval. That's a good measure of how your oil is holding up. I change mine out with Mobil 1 every 5k miles, but my latest analysis with TBN seems to suggest I can make a 20k interval if I wanted to (assuming TBN scales linearly with mileage, which I would assume is the case).

2015rubyFX4

Totally agree. As cheap as an oil change is and how expensive a timing chain is. Its a no brainer.

rrp0968

I never have understood extended oil change intervals either. Oil is cheap, engines are not. As easy as it is to do, you could use any oil available, change it every 5k, be money ahead over buying Amsoil and be better off from an engine maintenance standpoint. Even $39.99 at the dealer every 5k is a bargain. That is $160 every 20,000 miles, includes tire rotation and you have new oil in your engine every 5k. Also, why spend money on an oil analysis, why not just spend that money on an oil change instead.

Just my .02