OK, if you could pick one of the following "big-name" 5W-40 HDEOs, which would it be: Delvac1, M1 T&SUV (if the two are in fact different), Rotella Synthetic, or Schaeffers? Application is a 2004 Ram 1500 Hemi with a TP bypass filter and very few (if any) actual oil "changes"- the sump will be replenished gradually by changing out a quart or two every couple thousand miles when changing the TP in the bypass. Obviously, then, this will be a year-round oil, and in NE Wisconsin, the temps can range from the minus teens in winter to 95 or so in summer. Cost and being able to buy it at "Wally World" (which I boycott for the most part anyway) are basically not a factor, though getting an equal or better oil for less cash is always a good thing. Your responses are appreciated.
Ultimate 5w-40
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I vote for M1 T&SUV, cause it has extra deterrgents to keep a diesel engine clean so it should keep a gasoline motor spotless.
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For me, off-the-shelf availability is important, mostly because I don't want to keep my pantry stocked with engine oil. M1 5W-40 is, at least where I am, commonly available. It als seems to work well in my engine, and I like the UOAs I've seen on M1 5W-40, including mine. I'm happy with it and see no other oil tempting me at this time.
I thought I read hear that Rotella 5-40 syn had no PAO.
I would go M1 T&SUV 5-40.
I would go M1 T&SUV 5-40.
Yes, the Rotella is honestly not really in the running, as I believe it is entirely group III. Still, I wanted to throw it out there in case I was missing something.
Elf Excellium LDX 5W-40.
Rotella 5W-40 has shown some excellent UOA's, though.
I'd love to see the ELF and the Delvac go head to head in a "battle of the motor oils" in which each oil is subjected to extreme temperatures, pressures and contamination.... orr VOA/UOA will be a sufficient substitute
All Redline oils have Moly!
That's what I thought. But OK, one other one to throw out that I forgot about too- Amsoil Series 3000 5w30. I know it's not a 5W-40 like I said I was looking for, but it is a fairly thick 30 (that tends to get thicker) and is an HDEO. A quick search shows it to fairly highly regarded. No moly, though. Right now I think I've got it down to Delvac1, Redline, or Amsoil S3000.
Friction modifiers have little or no effect in low rpm, pushrod engines w/ rollers, since most of the frictional losses are at the ring/cylinder interface and in the main/rod bearings. FM's are most effective in high rpm, OHC or DOHC engines - particularly those that use direct acting cam lobes and experience sliding friction.
The best way to reduce frictional losses in gas/diesel pushrod engines is simply to reduce the high temp, high shear (HT/HS) viscosity of the lubricant and maximize it's viscosity index (to reduce pumping losses at low ambient temps)....
The S3000 would actually be the THICKEST lube I'd consider; given the operating conditions and climate....
The best way to reduce frictional losses in gas/diesel pushrod engines is simply to reduce the high temp, high shear (HT/HS) viscosity of the lubricant and maximize it's viscosity index (to reduce pumping losses at low ambient temps)....
The S3000 would actually be the THICKEST lube I'd consider; given the operating conditions and climate....
I would go with either Redline 5W40. I like oils with a healthy doage of esters especialy if cost is not a factor! I would also conisder Delvac-1. You can order Delvac-1 in a 4 gallon case from one of our site sponsors!
Redline 5W40 is the only 5W40 I have tested through a Michigan winter and as such is the only 5W40 I can recomend for a cold climate.
I have been considering Schaffers 5W40 for a while. I would not use Schaffers 5W40 with an extended OCI though!I prefer synthetics for extended oil changes because they are just so much cleaner.
Redline 5W40 is the only 5W40 I have tested through a Michigan winter and as such is the only 5W40 I can recomend for a cold climate.
I have been considering Schaffers 5W40 for a while. I would not use Schaffers 5W40 with an extended OCI though!I prefer synthetics for extended oil changes because they are just so much cleaner.
You know, I kind of forgot about the Redline. My only concern with that is some of the funky UOAs we've seen, but I guess the consensus with that is at the end of the day (or more correctly, at the end of a few OCIs), it really works well. Does the RL 5W-40 have moly? That's one reservation I have about the Delvac/T&SUV. I like my moly.
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