Im with Gary.
And I guess I should just keep my mouth shut . . but I won't.
I have family in the oil blending business. He's done these pure base stock low sulpher oils with synthetic additive packages for greater than 15 years. Has enough sample data to prove the extended drain concept. That's easy to do! It's a concept that's provable!
Back to the point . . I've personally viewed hundreds of sample print-outs from all type of in-service diesel equipment. And I can say without a doubt . . it would be physically impossable to benchmark 2 engines to the point where you can claim one filter is better than another.
The most consistant data is from generators where the load is constant and they both run at the same rpm's and for the same duration. This would be the best real world operating environment I can think of that would cause the engines to consistantly produce the same partical size. Then once you've proven that 2 identical engines produce the same partical size then do the filter comparison.
Has anyone done this type of comparison?
If I did 5000 miles a month and didn't have anyone I could trust to change the oil . . then I'd invesitgate a way to extend the interval by deploying a bypass high performance filteration system. Other than that . . It's my opinion that it would take a long time for one to realize a payback from that investment.
It's just too darn simple on my Y2k to spin off the filter . . fill the new one up with makeup oil . . and spin it back on . . what less than 10 mins?
I just got past the point where I feel the engine is broke in 22k. I just went to my brother in laws oil and plan to extend the drain interval to 8k from 5k. Not that I don't trust my brother-in-law . . but I'll put on a new fleetguard at 4k. He claims longer . . but I won't. Hey I need to check those rear brakes at a decent interval right?
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He runs a delivery fleet of 5-3500 CTD's . . where they do a 10-12k change intervals without changing the fleetguard . . and nothing out of the ordinary with the sample results. One truck with 340k miles, three over 160k and the 2 newest Y2k's are over 70k miles.
I'd agree that if you do a side by side comparison of that fleet's results with one that has a bypass system and fancy filters, that you'd see a difference in the sample results. But can anyone prove that he would have got 100 or even 1000 miles more out of the engine if a better filter system was used? I doubt it.
My brother in law would more than likely realize a payback with his fleet by extending the drain interval even longer with a bypass system . . but his oil is free. I can say his fleet's samples are noticably better than 5k Rotella samples in simular equipment at the intervals he's running. Imagine how much better the results would be if he did a 5k fresh filter. Yeah the particulates need to come out . . but most of your protection is in the oil guys.
Sorry guy's I just don't see it for a regular duty CTD. I get the deep down feeling it addresses the "warm & fuzzy" emotion . . kinda like sending in that Ed McMann entry to increase your odds of winning.
Let me clarify, I'm not knocking that product. I've seen a few, they are a very high quality add-on. But is it needed? I dunno. Cudo's to those who have'em . . nice!
Im finished . . let the blasting begin.
Michael
[This message has been edited by madams (edited 03-14-2001). ]