Prior to your post, I never heard of Kendall oil before. Today I noticed our Mobil 1 Lube Express in town is now a Kendall Motor Oil Express Lube. It's a town about 5,000. It's our only express lube place, & it's selling/using Kendall oil. Imagine that!
They have two stalls to work on cars. The other stalls are part of the cash wash. I actually turned around to take a pic!
There are YouTube videos that show different full-synthetic oils being tested. Kendall was in the top five oils that scored high.
It's much cheaper than Mobile 1.
I don't go by mileage when I change oil. I use color and smell. Once it becomes opaque I change it.
3banger
Just looking at Kendall's website, they have some history in the motor oil industry. Their two finger symbol relates to producing the first motor oil that could go 2,000 miles. That's tells you how much products have changed! They also claim to be the first to market 10W-30 motor oil. Some sources connect them to Motorcraft oils, but they are definitely a part of Phillips 66 today. The bottom of their website connects them to Phillips 66, & even this new Lube Express in my area displays Phillips 66 on their sign.
I have no doubt Kendall is a quality oil, too!