Sorry but that's total fuc*ing bullsh*t
pardon my French of course.
Why is this BS?
2000 Ford Mustang GT: 4.6L SOHC V8, made in the Windsor engine plant. Uses better build quality along with retaining rings to hold the piston wrist pin in place.
2000 Ford Crown Victoria: 4.6L SOHC V8, made in the Romeo facility. Uses slightly lower build quality, uses pressed pins for the pistons.
1998 Ford Mustang GT: 4.6L SOHC V8, also made in the Romeo facility.
2001 Ford Mustang GT: 4.6L SOHC V8, made in Romeo facility.
2001 Ford Crown Victoria: SAME ENGINE AS THE MUSTANG GT, COMPLETE WITH PI HEADS.
prior to 2000, all of these cars used 5w30.
All of a sudden in 2001, Ford wants us to use 5W-20. The engines were certainly not changed to REQUIRE 5W-20. I do not see any changes in the metallurgy or bearing clearances that would warrant 5W-20. The experts that work on modifying these engines also agree that 5W-20 is not mandatory.
Exxon Mobil is just spewing out crap that Ford and Honda wants them to spew out. That's why synth oil companies like Redline are making their 5W-20 or SAE 20 oils to meet the new market demands.
Mobil 1 was smart in giving a real response. They're making the 5W-20 and want to make money off of it, but the smart tech person actually has hands on experience with a vehicle (mustang actually). Turk from Exxon seems to be a run of the mill customer service rep guy that knows jack about cars.
Yes 5W-20 might be an excellent oil but I just don't see a legitimate reason to use it OTHER THAN FUEL SAVINGS (as slight as they might be).
I'll continue to use 5w30 in my 2000 4.6L SOHC V8, and I'll use 5w30 in my 2003 5.4L SOHC V8.
5w30 and 0w30 have better thermal stability than the lighter weight 5W-20.