Yes it is.

The V10 is not included in the corporate CAFE. Only under 8500 pound GVW trucks are rated under CAFE. There is no official MPG rating for any V10 powered Ford.

I used to own a repair shop. I've seen modular engines come in that were totally worn out from running heavier oils. There are clearances in the modular that are not large enough to flow enough of thicker oils, so if you run a thicker oil some parts of the engine won't get enough oil.

Exactly.

No, not so much on the V10. There is no MPG rating on this engine, so gaining a half of a MPG gains them nothing.

The design life of the engine is WAY beyond 150,000 miles.

I had a V10 that I used to tow 9,100 pounds. I sold it at 150,000 miles and I had no concern using conventional 5W20 oil.

That's not true. Ford did NOT design this engine, nor did they sign off on the design. They signed off on the performance of the engine. International owned the design and sold it to Ford as a complete assembly.

Some design flaws? If you look up design flaw in the dictionary there is a picture of the 6.0L. The engineers knew about the flaws, upper manglement decided to push on regardless.

They sure do, but only on under 8500 pound GVWR vehicles. It doesn't matter at all for heavier vehicles, such as any Ford with a V10.

I'm not a expert but I ran both 5W-30 and 5W-20 in both of my V10 motors and I couldn't tell any difference on how the oil looked or smelled when changed. Most of the time I had both of them I ran Mobil 1 with no change in usage, sometimes 5-20 wasn't on the shelf so used the 5-30. I pulled my 16K trailer over Berthhoud Pass and Eisenhower pass more times than I care to count and that truck had 130K on it when I traded and the motor showed no ill affects from the light oil, the transmission was the reason I changed trucks. My other V10 was my work truck and last time I talked to the guy I sold it to it had 275K and still going strong.

When I bought my 6.2 I decided to just run the Ford blend and because we are almost never at our homebase I just have Ford change it when I'm close to a Fast Lane. I think one of the biggest reasons for the light oil is the overhead cams that need oil fast at startup and the newer motors have closer tolerances so heavy oil is no longer needed and may cause harm over time.

Denny

I've seen v10 airport shuttle vans run 600-700k with 5-20 dino oil at 5k intervals and still running great so no problem. Theres a guy out there with a 5.4 in a 97 van that finally died at 1,200,000 miles.Home

heres another
Mod motors rock.

Mark, great info. Thanks for your input.

Fair enough: my comments about "snake oil salesman" were inappropriate. I'm sorry.

But you need to understand that YOU are the odd man out. You are the ONLY ONE that thinks you are innocent. Krewat mentioned the standing policy about Amsoil people and it's there for a reason. And you were toeing the line. I saw it in your posts here and on the thread about V10 oil consumption.

Please chill out, delete/edit your posts and play nice. You will be WELCOME here if you do.

fords order of concerns when designing a new engine design .
1) price of production
2) price of production
3) government requirements
4) longevity of the motor
I switched my v10 to 5w30 . I have noticed my oil consumption has dropped between changes.

I'm a dealer, but I'm not pushing anything. OK This is the standard Amsoil dealer line I've heard for years now. Enough.


Large molecules don't "boil off". Small ones do. You know, the ones that don't need a lot of energy to get hot. The large ones stay behind.

It's called "volatility" and while Amsoil claims to have the lowest NOACK numbers, it's not all that different than the rest.

The following graph is all over the Internet. It's from 2003, and no where does it specify what weight oils were tested. Even synthetic base stock needs to be modified to achieve different viscosities, and depending on the viscosity - and most importantly, the spread been cold and hot (cWh) viscosity, there are varying things mixed with the base stock to get there. http://en.wikipedia.org/wiki/Oil_additive
The following graph is used here to prove a point, not how good Amsoil is }>

https://www.worldsbestoil.ca/Amsoil-...ility_test.gif

--

Back to the subject at hand, if 5W20 is good for V10s.

Yes. It is. I wouldn't hesitate to use 5W30 either, but again, the additives that are used to achieve that spread may be marginally worse overall than just using 5W20 in the first place.

Actually, it doesn't show anything germane to this discussion about using 5/20 vs. 5/30 or some other weight in a V10.

What I'm pointing out is "volatility".

And I've gone WAY off topic, and I apologize profusely to the original poster.

:-hijacked

Back on topic ...
 

Just in case anyone hasn't read the other thread- "V10 burns oil"

I switched to 5w30 at my last oil change and noticed a reduction in oil consumption. Used to be 1qt per 1,000miles now it's 1qt per 2,000.

So I'm saving about $4/week. And judging by Mark Kovalski's comments I may be better off spending that $4 on the correct oil.

Funny thing though: I have this internal joke that my V10 is "partial-2-cycle" because there is a direct ratio of fuel : oil, of about 320:1 lol. (Every 80gallons it needs 1 quart)

My 2000 V10 work truck burned a quart every 2K from new and last I heard at 275K it was still using one quart every 2K. It didn't seem to make any difference if it was 5-20 or 5-30, my other V10 used one every 4.5 from new until the day it went to a new home.

Denny

Thank you Mark K for your expert opinion. You should write a book or a repair manual or something. I love to read your posts. Charles Probst wrote a book on EECIV back in the early 90's that really got me off to a good start on fuel injected vehicles.

I don't think I would ever consider Amsoil after the other guys rant. What a waste.