quote:
Originally posted by G-Man II:
From my own experience using this oil, I can tell you that the 3.5 liter HO engine in my Chrysler 300M gets just as good gas mileage with the Castrol 0w30 as it did with Mobil 1 10w30. I just completed a three-day road trip of about 900 miles and I averaged 28.1 mpg for the entire trip. This was mostly interstate driving at 70-75 mph, with roughly 40% of that in the mountains of western Tenn. and eastern NC.
G-Man II,
That is an interesting test of "theory" and "practice." Mobil 1 0W40 is, in its latest formulation, an "Energy Conserving" oil (says it in the "doughnut"), but Castrol 0W30 is not. Yet, from what you say, I'm guessing you'd have the same gas mileage results when comparing the Castrol 0W30 and the M1 0W40. So how is that in testing one gets the rating at a 40wt and the other doesn't as a 30wt? If your mileage results are similar at the 30wt level, the Castrol has got to do as well or better against M1 40 wt (unless they have put some "magic" in the latter).
[ August 15, 2003, 01:29 PM: Message edited by: pscholte ]