Viscosity Grade recommendation for Death Valley

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With one exception, and that is the Tundra. The Tundra owners manual specifies a 0W20, but then says, basically, in instances of hard use, a higher grade may give better protection. So, 5W30.
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That's what I've been doing also in my Tundra. I switch between Valvoline EP 5W-30 (say hello to moly) and M1 EP 10W-30.
Don't mind trying a nice (The "Euro" kind if available) 10/15W-40 when I'll be towing.
 
Actually, 100 HP at 1600 rpm is more torque than 100 HP at 2,000 rpm. There would be more torque in the crankshaft in the 1600 rpm version. 🤓
To add ... if an engine was putting out that same 100 HP but at 4500 RPM, the oil shearing and friction would be even higher and adding more heat to the oil than it would if making that same 100 HP at much lower RPM. The higher torque at lower RPM doesn't add that much heat compared to higher RPM and the increased heat load from oil shearing and friction. Re: A differential example again. Drive 50 miles at 20 MPH and then drive 50 miles at 100 MPH and see which differential is hotter. Of course there will be more load on the gears in the 100 MPH example with adds a lot of load friction heat. Or another example by trying to take the load out of the situation, is to free rotate the differential at 1000 RPM until the oil temperature stabilizes, then free rotate the differential at 3000 RPM until the oil temperature stabilizes. The difference in temp rise in this example will mainly be from just shearing the gear lube since there wouldn't be any significant loads going through the gears - ie, free spinning it with no real load on the output.
 
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I assume this where we get to hydrodynamic & EHL regimes vs. boundary lubrication regime in case of gears. No?
Yes, load and therefore the friction level in gears (transmissions, differentials, etc) are pretty high in components like that since they are transferring all the HP put through them. Also associated with the friction in those components, there is a HP loss as we all know. A transmission or differential could be losing around 5%-8% of the HP put into it, and that is transformed into heat.
 
thats what the guy from the video suggest,says it has the most PEA ,the best cleaner chemical for that use.but not gumout.
Gumout Regane has PEA. Are you saying that Redlne SI-1 has more PEA than Gumout Regane?
 
Gumout Regane has PEA. Are you saying that Redlne SI-1 has more PEA than Gumout Regane?
i supose you didnt read it.
not me the guy in that forum,reddit. he says:
Gum out techron both work OK but are nothing special. Seafoam regular gas additive and flush sucks ass and is literally just pale white petroleum oil and alcohol it has no PEA the active ingredients in gum out and techron. The best gas additives on the market are redline fuel system cleaner which has the highest PEA on the market and easy to order on Amazon. It's also in many stores. Amsoil pi is another good one but might as well get the redline stuff.
 
Wasn’t he the famous mathematician that finally figured out Who’s on first?

(Richie Havens?)

1720816029536.webp
 
i supose you didnt read it.
not me the guy in that forum,reddit. he says:
If you're referring to the poster "No_Article4391" he doesn't specifically say what the Gumout Regane contains in terms of PEA percentage, so who knows. Gumout makes may different varieties of injector/fuel system cleaners. I've used a lot of Redline SI-1, and have used some Gumout Regane based on other things I've read about it someplace, not that article.
 
So what's the deal? Is this PEA the stuff that does the cleaning the best? How much and how often?

I bought 3 cans of the Gumout with PEA, and 3 bottles of Techron.
Once maybe every 6-10k, but only once per oil change. The PIB/PIBAs in the better cleaners can cause oxidative thickening if too much makes it past the rings into the oil.
 
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