I'm curious: is anyone out there using additives with their FEHs, specifically zMax? I used it on my diesel truck and it did make a difference. However, with the FEH using a thinner synthetic oil (5W-20) to meet the Ford 930 standard, I'm wondering if an additive is of use. I worte to the folks that make zMax and the reply I got back seemed more like the normal, boiler-plate response, claiming it was great stuff and would help the car under all conditions. The problem was that all their descriptors were geared toward a conventional engine, not the hybrid.

Any insight appreciated.


Bob
06 FEH 2WD
Fayetteville, GA/Enterprise, AL

 

never used the stuff on my cars.
But if your car is running great why do you need it?

 

Why, more potential mileage? sayeth he.



Bob
06FEH

 

Ford's '09 FEH manual states do not use oil additives or gas additives and I agree.

GaryG

 

Ever hear of S N A K E O I L ?

 

The best you can hope for is that these additives do no harm.

If you want a real benefit use a full synthetic. There aren't may around although many claim to be synthetic. Mobil One, Amsoil, & Red Line are the only ones that I believe are 100% synthetic. The rest are a dino oil base stock with a synthetic additive package. Helps them price it higher.

So far as oils & additives are concerned there is no difference between a hybrid engine and regular engines.

 

And limited evidence that slight differences in oil viscosity can make measureable improvements in FE.

 

Viscosity relates directly to internal engine drag. A lower viscosity will yield better mileage. Evidence is clear on an engineering basis. However, it is a matter of discussion as to whether it makes significant real world difference.

But then, it must make some difference since the auto manufacturers have progressively reduced recommended viscosity over the years as they make ever more difficult mileage standards good...

 

It does make a difference of 1 to 2 mile per gallon depending on car and engine..