First of all, I like Rotella-T.

Second of all you can't beat a FRANTZ bypass filter. It works by using a roll of Toilet Paper as filtration media. It filters particles and removes water from your oil. YES it works, NO the paper doesn't break down and get in your oil. The only drawbacks I've heard is that in below freezing temps the water in the TP can freeze up and keep it from running - however it is a bypass unit, so even if it clogs up it won't hurt anything. If you use it correctly it will keep your oil sparkly-brand-new. I have heard of some going for over 200k with the "same" oil. You change out the TP and top it off a quart about once a month. BEST crazy invention I've ever purchased!

 

i serviced a fleet of 8 petes running 300,000/yr each and all we used was rotella 15-40, thats what i use.

 

anyone use NEO? my freind with a psd has been tryin to get me to switch to it. he was turned onto it by some "diesel nut". 1 year 100,000 miles, whichever comes first.

 

I use dello 400. the old girl seems to like it.and as many miles as she has on her, I think I'll keep using it.

 

No matter what oil you run, someone has prob gone 1 million miles on it, cheap no names to expensive marketing ploys.

I will say one thing....today, any engine looks clean with routine oil changes, the only sludge that I have seen in a new engine is that where the oil was never changed.

Whatever you use, stick to it. Same with filters, you get what you pay for, but Im sure that OTR drivers have went 1 million miles on even the cheapest of filters(Fram comes to mind) I always recommend opening the yellow pages to a Med or HD Truck Parts dealer if your unsure what brands are available in your area, and ask them. Make sure you use the filter cross ref. in the tech section of the website, and give them another filter number, because some truck dealers wont show a listing for our trucks.

 

My 93's got over 1,124,000 miles running Rotella T 15-40 at $5.60 Gal. (bulk price). Changed every 10,000 miles. Still running good!!

 

Hello 440forpower. I have used the rotella synthetic for 3 years. I bought my truck with 180k on it and put the synthetic in it. It has been outstanding. I send oil samples in about every ten thousand miles. Still looks new. Yes, it black, but thats ok. I recently changed to amsoil synthetic, and I can tell you, there was a noticable difference. Truck ran smoother, started easier, especially in the cold. I was so happy with the amsoil, I changed all the fluids in my truck with amsoil synthetic. I seriously increased my mileage to 2mpg on the highway. The $200 worth of oil was well worth it. Yes it was expensive, but the only oil you will ever have to change again is your motor oil. I would aslo stay with the fleetgaurd filter. Some people will argue saying that synthetic is not worth it but would say it is. Send an oil sample in from your old oil and then run synthetic for 10k miles, and send it in. See what ya get.
jason

 

I've been in an industry where diesel pickup trucks abound for the past 16 years. I've watched the guys play with the synthetic oils and viewed the results. Some were running 20,000 - 40,000 miles changing only the filter each 10,000. I also noted an increased rate of gasket/seal failure around the 300,000 - 400,000 mile mark. Front timing cover gasket failure & main seal failures being the most porminent. I've seen a B-cummins with 540,000 miles on it running Rotella T with the head removed (to change a leaky head gasket) and you could still see the cross hatch hone marks in the cylinder walls like it was new! Thats when I decided Rotella T was going to remain in my truck.
I use synthetic lube (95/140) in the rear diff. Great stuff (1,124,000 + miles), but the rate of wheel seal failure was increased greatly when I switched to synthetic. However, the cost of wheel seal replacement is nothing compared to bearings and differential parts replacement. Synthetic oils and lubes have their place, just not in my motor.

 

Does anyone out there run a synthetic 5W40 either winter only, or year round?

 

Oil is over rated, who needs it....

 

You're right Mr. Boomer, the synthetics do seem to be much thinner across the board resulting in leaky seals, BUT slippery is slippery(less wear, friction) and NOTHING tests better than the synthetics. You have done an excellent job with your truck to get that kind of mileage and that price per gallon is incredible but just because it's worked great for you doesn't mean that synthetics wouldn't go even farther. So you wouldn't trade changing some leaky seals every couple of hundred thousand miles for, lets say, another 300,000 out of your engine beyond dino oil??? would that not add up?

 

That's what cummins recommends fwiw. Go into any local truckstop and you will see just a couple brands of oil there, probably delo and rotella, either would be great. The best answer is to run the oil of your choice that meets the factory specs and the proper viscosity for your climate.

 

I've run it the last 115,000 miles and like it. My periodic oil analysis reports from Blackstone show normal metallic content (materials wearing off and suspended in the oil) and thus wear is normal.

DBF

 

I have been running amsoil in my truck for over a year now and love it my truck has a 180 k on it and she got better milage when i changed over also run their diesel fuel additive. But everyone has there say so when it comes to oil i only use the best for my truck as for mobil dont i like it but some people dont like amsoil your choice check out the specs and make up your own mind im a harley mechanic and 95% of my customers have changed to amsoil the mobil one in air cooled motors foams alot the amsoil didnt i know different beasts but a motor is a motor