427Z06, I guess that is why I am sticking with xw-20, because all of my receipts have shown the grade and I do not want a loophole letting the stealership off of warranty work if it is needed.
From "DAMAGE CAUSED BY IMPROPER MAINTENANCE (2001 Warranty and Policy Manual Section 3-4, Pg 77)" as posted in a link somewhere on this site (but for the life of me I can't find that postquote:
Originally posted by m6scargo:
Also wouldn't oil pumps have to be modified to account for the lack of viscosity?
As for the thread topic question, the manual states:quote:
Q. Why is 5W-20 not ready for all the 2001 Ford products, just some? Why can't we use the 5W-20 in the ranger 4.0L?
A: Some of our carryover Engine Designs are not yet completed with 5W-20. For instance, the 4.0L engine's oil pump must be redesigned for more oil flow before 5W-20 can be used. As we change engine designs, we will recommend 5W-20. Some engine designs will never be able to accommodate 5W-20.
But when they say 5w20 is better than 10w30 they are comparing apples (blend) to oranges (dino):quote:
Q. What if a fleet wants to use 10W-30 instead of 5W-20, is that problem?
A: If these are gasoline engines, a 10W-30 is okay. However, why wouldn't they want to take advantage of the fuel economy savings and superior engine protection of a 5W-20. Remind them that 10W-30 is two oil generations old.
And the cure for that is to buy quality 10w30, maybe a Group III. So the only superior thing about the 5w20 appears to be that it is well formulated-(better engine protection, but for being too thin (IMHOquote:
Q. Why did we change to 5W-20? What was wrong with 10W-40, 10W-30 etc?
A: 10W-30 and 10W-40 are old technology. We introduced 5W-20 to take advantage of new technology in the industry to provide improved fuel economy, low emissions, and better engine protection.
I think what they really are saying is that some bearing designs had to be revised to prevent these engines from being destroyed by this thin, but CAFE-fine-reducing oil.quote:
Q. Were engine designs modified to run this new grade of oil?
A. Some bearing designs were optimized to take advantage of the new oil. New engines will be designed to take advantage of 5W-20.
This is simple. These are old engine designs!!! They may of been bored/stroked, fuel injection added, etc, but some of these engines were originally designed over 40 years ago.quote:
Originally posted by 1sttruck:
I'll reply to one item at time...the Ford TSB on using 5w20 excluded certain vehicles from using 5w20:
Table 2. Recommended 2001 Ford engines/vehicles for SAE 5W-30 oil (in order of increasing displacement)
2.5-L Ranger
3.3-L Villager
3.9-L Lincoln LS
4.0-L Ranger, Explorer/Mountaineer, Explorer Sport, Explorer Sport Trac
5.0-L Explorer/Mountaineer
The best $bargain 5W-20 oils is IMO Exxon Superflo 5W-20. It is a high moly content oil which appears to be identical to the Honda branded 5W-20 sold at the dealer. The few posted UOAs with it in Hondas have been great. You can often buy it on sale for around $1.25-$1.50 per quart. There is also a rebate on case quantities available from the Exxon website.quote:
What should I use that I can buy "over-the counter". The 5w20 supporters mention Redline as the only 5w20 with a strong HTHS rating, but I'm looking for something that is a little less costly and easier to get my hands on. Are there any other 5w20 alternatives with a strong HTHS?
Hogwash. You proved nothing. Look at one of the designs. You have a main gallery feeding grooves in the camshaft bearings, which in turn feed the main bearings, which then have to feed the rod bearings. Oil off the main gallery feeds the lifters which then have to send oil up push-rods to the valve-train. There is so many areas where the oil can leak out, unless you significantly increase the pump volume, sump volume, etc, then Val/Ver it under numerous scenarios to insure against oil starvation, etc, you may as well stick with the higher viscosity oil since the engine is being phased out anyway.quote:
Originally posted by 1sttruck:
It doesn't matter how old the designs are or where they were designed, the only thing that matters is that they are proof that 5w20 does not offer the same protection as 5w30; if it did Ford would have spec'd them to use 5w20, since it doesn't they don't. Additional proof is that Ford will also recommend 5w30 outside of the US even though the vehicle may have been shipped with 5w20. Note that the 5w20 is a synthetic blend while the 5w30 is dino.
If you have a "copy" of that statement from the car makers I would love to see it.quote:
Originally posted by babydoggy:
Both honda and ford have stated that the life expectancy of their engines will be less with 5-20.