What oil do you use?
What intervals do you change at?
Thoughts on oil stabilizer?

I am thinking of starting to use synthetic oil and maybe a oil stabilizer (Lucas maybe).
I know the cost difference but I am trying to balance cost vs intervals etc.
I have heard as muck as 10k with Amsoil and no bypass filter.

I use Rotella 15w40 & Bosch or STP

Thank-you for your thoughts.
DD

 

Amsoil 15/40 fully synthetic

 

I like rotella as well. I change mine between 5000 and 7500 miles.

 

I use Mobil delvac 15/40. I change in between 7000 and 10,000 miles and use six filters. Oil is just as slick when I take it out as when I put it in. I highly recommend Mobil delvac. And in most places its actually cheaper than rotella and delo. My truck has 289,000 miles and runs like a new truck. Just my input.

 

Delo 400 15-40 every 5K, for the last 200K. No issues yet...

 

Delo 400LE 15-40. It's a low emission oil BUT, regular old Delo will not be available for much longer anyways. The LE is going to take it's place.
I began doing oil analysis thru the place I get my oil and depending on the results, I will progressively extend my change intervals, so we shall see where I end up, but probably end up somewhere north of 7,500.

 

Hm. I think I might be using the LE too. Not sure. It's whatever we use for the fleet trucks.
I'll know in another 1200 miles.
a.k.a. a few days.

I would not want to go 7500 on it. I don't really like going 5000, but it's company policy and I don't have to pay for it, so...

 

Amsoil 10w - 40 high zinc full synthetic every 5k

 

Spectrometer results will tell me if it's ok or not. I wouldn't go over 5000 without solid information. A $7 test is pretty cheap if I can stretch out oil changes 2000 or more miles. I'll share my results.
My supplier says 10,000 isn't out of the question though. And he's the one selling the oil so it wouldn't make much sense for him to be less than truthful only to not sell as much product. We shall see. Should be a cool ( albeit a long) experiment.

 

Rotella 15w40. I change it between 3 and 5000. more towards the 3000 mark