Why?
What Ford says about 5W20!
- Thread starter Stooge
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GoldenRod,
I may be able to answer your last post. "Why?"
Tamu_man might be right. Look at BMW specifying high viscosities in new cars. They do that because BMWs are typically driven hard, certainly in Europe, and also in the U.S. More viscosity helps hold the oil film together under pressure.
I may be able to answer your last post. "Why?"
Tamu_man might be right. Look at BMW specifying high viscosities in new cars. They do that because BMWs are typically driven hard, certainly in Europe, and also in the U.S. More viscosity helps hold the oil film together under pressure.
Geez, well if its 5W-20, then no one better use 0W-20 or *** forbid, 0W-30, synthetics. Not spec'd.
How about this? Let's let Ford continue to antagonize its dwindling customer base further, and they can go away altogether. What are they now? 16 - 18% of the market? and falling...
Good, let them go belly-up.
How about this? Let's let Ford continue to antagonize its dwindling customer base further, and they can go away altogether. What are they now? 16 - 18% of the market? and falling...
Good, let them go belly-up.
Maybe you should start a separate thread for that Goldenrod. There is some disagreement to this. Best way I can answer it is get a set of gauges and hook them up to a motor designed for 5w20 and measure the pressure after the oil pump. Use different weight oil, take the car for a drive and observe oil pressure over the driving cycle.
I would think the volume would go down with 10W30 which would mean the pressure would go up. Since pressure and volume are inversely proportional, that would mean an increase in pressure with 10w30 at the expense of less oil volume to the bearing(s).
Thoughts?
Thoughts?
All the talk about flow/viscosity/properties, etc. is irrelevant in the case of a warranty isn't it? Ford doesn't have to prove their theory behind their specs, the owner DOES have to prove he followed them if he wants to fulfill his obligations and expect a free repair under warranty.
I own a couple of Hondas and it really chaps me to have to follow their screwy proprietary lube specs. Do I do it? YES until the warranty is out.
I own a couple of Hondas and it really chaps me to have to follow their screwy proprietary lube specs. Do I do it? YES until the warranty is out.
Doesn't the oil pump's pressure relief valve determine the working oil pressure? If that's correct, then wouldn't it follow that oil pressure is constant (at least within the tolerance of the oil pressure relief valve's mechanics) with the real variable being the volume pumped, right?
47Z06, GoldenRod, MC5w20,
I might be on to something (then again, maybe I'm full of sh**, uh, I mean engine sludge...) but the new thread http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=42;t=003315 might just make the future reason we'll all be using low-visc in the future -- micro-shaping of surface features. I've been a 20-weight basher a little, and I'm changing....
I might be on to something (then again, maybe I'm full of sh**, uh, I mean engine sludge...) but the new thread http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=42;t=003315 might just make the future reason we'll all be using low-visc in the future -- micro-shaping of surface features. I've been a 20-weight basher a little, and I'm changing....
Yes. The volume pumped is inversely related to the viscosity. Same thing for the flow through the bearings. The rise in temperature of the oil in the bearing is directly related to the viscosity.
You obviously never owned a BMW/MB/Audi. For whatever reasons, they just can't survive on low viscosity oils.
Mobil 1 5w20 meets the A1/B1 specs
And to meet the A5/B5, you need to have a HTHS value of 2.9-3.5 which would then make it almost impossible to meet the Sequence VIB requirements.
Wrong again. My '01 BMW 525iAT looked good next to my '40 and '41 Chevy until I sold it recently. The viscosity BMW specified was high. Why was that, do you think?
" ...Sequence VIB requirements "
Is that due to less fuel economy with the higher HTHS?
Is that due to less fuel economy with the higher HTHS?
G Man II,
High viscosity meaning higher than a 20, since the topic here is 5w20. However, I seem to recall the dealer was using BMW (Castrol, yes) oil in a 5w-40 grade when they did the oil changes. I notice now that Mobil recommends 0w-40 for an '01 BMW 525iAT.
High viscosity meaning higher than a 20, since the topic here is 5w20. However, I seem to recall the dealer was using BMW (Castrol, yes) oil in a 5w-40 grade when they did the oil changes. I notice now that Mobil recommends 0w-40 for an '01 BMW 525iAT.
Yes, they have to demonstrate a certain percentage better fuel efficiency than a 5w30 3.0 HTHS standard oil. HTHS and fuel efficiency correlate fairly well.
Posted by the G-Man:
Just speculation, of course, but perhaps the engineer was there precisely to help Ford make that case. They know that they have the burden of proof if the case goes to court, and they also know that they'll need an engineering expert to meet that burden. There won't be any engineers poking around when you've got a broken radio face plate, but an engine is, obviously, a rather expensive thing to replace.
Ford was simply wiggling out of this one. Bogus stuff.
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