Wrong Engine Oil
Senior Member
Joined: Jan 2001
Posts: 305
Likes: 0
From: S. Paul, Minnesota
Originally posted by Dennis
...and I'll ask this question again. If the switch to 5W-20 was solely to increase the CAFE, why did Ford send out a bulletin saying 5W-20 is approved for use in most of the engines Ford has built for the past 10+ years?
...and I'll ask this question again. If the switch to 5W-20 was solely to increase the CAFE, why did Ford send out a bulletin saying 5W-20 is approved for use in most of the engines Ford has built for the past 10+ years?
To me you just answered your own question. The reason they sent out the bulletin was so they could squeak out every little bit of increase in fuel mileage and make ford's overall numbers look better. It simply means that 5W-20 provides adequate protection even on the older engines, AND you also might get a little better fuel mileage and make ford look better in the end.
just my .02
Tony