Tried GC in 4.6L Ford Modular. It felt like...

[Rodbuckler]

I've have since found that the PP 5W-20 and 5W-30 did not maintain its smooth feel for too long, nor did the Syntec 5W-30 in this 4.6L 2V. Syntec 0W-30 was very smooth in the engine, but I had to drain it because of the power loss. Best oil I have used so far in this engine is Syntec 5W-20 with a quart of conventional HDEO dumped in to help control oil loss. My engine has 227K miles on it and runs like new aside from the 1qt/1500miles oil usage.

 

[carter]

Quote:

---

quote:

---

Originally posted by Rodbuckler:
...I was towing an ox cart heaped high with elf carcasses. WOW, what a power loss! Water temp was up, and power was down. But I just had to try it.

---

What motor was this, if you don't mind my asking? I am considering GC into my 4.0 SOHC Explorer. This engine is not back speced for 5W20. Ford has specifically excluded it. But this post is giving me second thoughts about the GC. Thanks forums/images/graemlins/confused.gif" alt="" />" src="images/icons/confused.gif" />

---

After 50k miles of M1 5W-30 in my wife's 4.0 Explorer (with negligible oil consumption over a 5k OCI), I decided to try GC after the Group III debacle.

After 1500 miles, it seems to be happy. Negligible oil consumption. Gas mileage is up about 0.8 mpg, but I changed out the nasty factory fill diff fluid with some M1 at the same time. I would be shocked if the diff fluid could produce a 6% change in fuel mileage.

 

[Primus]

Try 20W-60 and then switch to GC. After this you will hardly see a difference between 5W-20 and 0W-30.

According to my own experience I would say that in winter time an american type 10W-30 synthetic oil is often more comfortable (especially for sensitive drivers) than 0W-30/5W-30 ACEA A3/B3. Despite its 0W- in certain engines GC may be preferable for use in summer time.