The 5w20 oils seem to be put together fairly stout. Jury is still out, but my bet is that cars run on them will go the distance as well as the heavier oils and maybe better...just my opinion.
Mazda's extreme spec for 5w-20
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Do you have any used oil analysis of these applications?quote:
Originally posted by dustyjoe1:
1998 expedition 5.4, 1998 f150-4.2, 2002 civic ex.
Running motorcraft 5w20 in 5.4 and honda, pennzoil 5w20 in 4.2.
yesterdays temps. About 108 F. No problems.
In fact, by the seat of the pants, the honda at least seems to run smoother in the hotter temps.
The vast majority of SUV's are considered TRUCKS because they have a flat load floor.
Truck CAFE is 20.7 MPG Average (55% City / 45% Highway) not 27.5 MPG! Also CAFE is figured using actual EPA lab test figures not window sticker figures (Figures seen on Window Stickers are 10% less City and 22% less highway than actual lab test figures).
What does this mean in the real world?
If you produce only one model truck with a window sticker that reads 15 MPG City / 20 MPG Highway (16.7 / 25.6 Lab) you will meet the 20.7 MPG CAFE.
Well bottom line in NHTSA's annual report Ford failed the CAFE passenger car AND light truck requirement in 2002. They only met the average through incentives earned by the sale of alternate fuel vehicles.
See: http://www.nhtsa.dot.gov/cars/rules/cafe/FuelEconUpdates/2002/2002AnnualUpdate.pdf
Looks like Ford and Mazda are considered the same company for the CAFE calculation (?).
A good read here on the tricks of the trade: http://www.nhtsa.dot.gov/cars/rules/cafe/overview.htm.
See: http://www.nhtsa.dot.gov/cars/rules/cafe/FuelEconUpdates/2002/2002AnnualUpdate.pdf
Looks like Ford and Mazda are considered the same company for the CAFE calculation (?).
A good read here on the tricks of the trade: http://www.nhtsa.dot.gov/cars/rules/cafe/overview.htm.
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Your coolant gauge has most likely a dead zone around operating temperature. Car makers do not want to worry drivers unnecessarily.
The pdf from the government on the other recent thread mentioned the "graphic" in the car manual and a requirement that it be stated that 5w-20 be clearly identified, etc., etc.
The only time I saw a problem using lighter grade oils was about 15 yrs ago driving a Nissan 300ZX turbo near Big Bend, TX. The air temp according to the car's dashboard was 116 degrees F.
We lost oil pressure completely to something less than the usual hot idle psi reading (the guage just kept creeping down) while cruising about 80 mph. After the car cooled it went back up a bit. It was running 5w30. I don't know if the oil film actually broke down. We had no funny noises.
CAFE rules are a real threat to US car makers who rely on SUVs for most of their profits. The requirement now - 27.5 mpg - is pretty high for a company selling a lot of vehicles getting 16mpg or less. If I were Ford I would pull every trick I could to get the fleet average higher. Honda is also making most of their money on v-6 sedans and SUVs that get relatively low (18/23) mpg.
The only time I saw a problem using lighter grade oils was about 15 yrs ago driving a Nissan 300ZX turbo near Big Bend, TX. The air temp according to the car's dashboard was 116 degrees F.
We lost oil pressure completely to something less than the usual hot idle psi reading (the guage just kept creeping down) while cruising about 80 mph. After the car cooled it went back up a bit. It was running 5w30. I don't know if the oil film actually broke down. We had no funny noises.
CAFE rules are a real threat to US car makers who rely on SUVs for most of their profits. The requirement now - 27.5 mpg - is pretty high for a company selling a lot of vehicles getting 16mpg or less. If I were Ford I would pull every trick I could to get the fleet average higher. Honda is also making most of their money on v-6 sedans and SUVs that get relatively low (18/23) mpg.
Kind of like the wonderful Ford oil pressure gauges that read perfect pressure as long as there are 2 quarts in the sump.quote:
Originally posted by moribundman:
Your coolant gauge has most likely a dead zone around operating temperature. Car makers do not want to worry drivers unnecessarily.
Mobil 1 0w20 bottles state that if your car calls for 5w20 you can use this oil. My mazda6s V6 manual also says 5w20.
[ June 18, 2004, 07:49 PM: Message edited by: EricZoom ]
[ June 18, 2004, 07:49 PM: Message edited by: EricZoom ]
mikep,
I apologize. I seem to have made an error. The sump increase was only for the 6s 04's, not the 6i. I guess ford made a generic sump increase across the 3.0 duratec's, which of course effected the mazda 6s as well.
Its up to 6.0 qts in 04, while it was only had 5.5 qts in 03. Going to screw up the UOA comparisons **** it!!!!
I apologize. I seem to have made an error. The sump increase was only for the 6s 04's, not the 6i. I guess ford made a generic sump increase across the 3.0 duratec's, which of course effected the mazda 6s as well.
Its up to 6.0 qts in 04, while it was only had 5.5 qts in 03. Going to screw up the UOA comparisons **** it!!!!
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