I use whatever is cheapest between Rotella, Blue, Delvac or Delo; or whatever happens to be on the shelf when its time to buy. All are great oils and at 7500 mile change intervals it really doesn't matter which one I use.

Oh, and Fleetguard Stratopore is my filter of choice.

 

I recently switched to rotella 5w40 for year around use.

 

It's cheaper running synthetics if you're doing extended drain intervals. Which is the whole point of running syns. But then you'll want to be using bypass and having oil analysis to get the most out of your intervals. There's no way you can run a truck on dyno oil changing it every 5k miles over a million miles and come out cheaper than a truck on syns/analysis/bypass/regular filter changes having the oil changed when the lab says change it. It won't even be close you'll spend a ton more money on dino oil.

 

I use to work for Cat for several years and alomst all of our customers run regular Dino oil and never had a problem. Many way over a million miles.

Just run the extra filters on the dino oil. Most large compressor engines will run at 100% load for weeks on end and thousands and thousands of hours before tear down and they use dino oil and several filters.

I have over 270K on my truck and dino oil since day one. So far no problem at all due to lubrication or viscostiy. I change mine every 5-7 sometimes depending on where I am I have pushed it so far to 14k before I would change it.

 

schaeffer's 9000 here.

 

That's all beside the point. We run 18 wheelers on dino oil with 30,000 mile intervals. It's not unknown to run a dual remote bypass, synthetic oil, and regular analysis in a big truck for 500,000 miles without ever changing the oil. With only peridocally changing the filters and keeping the oil topped off.

I'm not trying to start a war here just taking issue with where he said it was cheaper to run dino. It's more convienent to run dino but it costs a ton more in the long run.

Now if you're talking about somebody switching from a 5000 mile dino interval and going to 10,000 mile interval on syns that's a different animal. Dino would make more sense moneywise in that case. Either, or, will be good for these engines for a long long time do whatever makes you happy. I've never been one to beat up on anybody for changing their oil however they please..

 

I understand how the big trucks work and how the operate their PMs

We did some of this type of stuff at Cat in the past in working with our customers. In most cases apples to apples the money saved was very little. If you run extra filters, bypass filters and pre filters and do regular oil samples and know how to understand them then why pay more for the SYN? You know what the engine is doing and what it takes to keep running.

Just depends on how they are going to use their engine and how long they are going to keep it. I agree with you not starting a war because I dont stand to benefit either way. I say if it makes you feel happy by running something then use it!

 

I run Amsoil synthetic 15w40 with an Amsoil filter and no bypass, and I go 25k between oil changes. I do change the filter once in those 25k miles, and every time I have had the oil tested, its still tested ok, even after 25k miles of use, and with a GOOD filter, the oil doesn't get dirty, because the filter does its job. Amsoil's EaO filters are guaranteed to work for 25k miles, but I choose to change mine every 13.5k just because. Amsoil also has a 15 micron filter efficiency, which is something other filters cannot claim. Those of you saying Amsoil is hype are entitled to your opinion, but I know what Ive seen, tested in my own truck, and I love the stuff... Which is why I became a dealer. My truck is still under its factory warranty too, FWIW.
Scott

 

I have used both Mobil Delvac and Chevron Delo. I'm running Delo now and change the oil every 4000-5000 miles. I have 77,000 on it now and figured if I changed to Synthetic at this point it might start to use a little oil and I didn't want to take the chance.

 

It's not just a matter of keeping the oil clean. My understanding is that over time the dinos simply wear out due to heat and shear whereas the synthetic blends don't.

 

Real Syns and blends still wear out and break down it just happens at higher temperatures.

Most of our large engine guys would run an oil additive in the Dino oil to help offset the breakdown and decrease lubricity that may occur.

Either way keep it clean and keep it changed and the engine will last. Tons of our customers ran Dodge rams and they had over a million miles on them and they would really push and beat on them and would never have a problem.

 

what is the purple oil called(name)

 

royal purple

 

Royal Purple 15W 40 Synthetic and fleetguard oil filter every 7500

 

Mobil delvac 1 full synthetic. Its meant for diesels. every 12,000-15,000 on fleet trucks according to mobile 1