Re: [DML] 15W40 oil brand

[Soma576@xxxx]

In a message dated 1/3/04 12:16:34 PM Central Standard Time, 
scott.a.mueller@xxxx writes:
Do not go cheap on your motor oil. Use a name brand petroleum based oil and
change the oil and filter frequently. The Technical reference guide states
that you should use API Service SF, above 10F, 20w/40 or 20w/50 and below
10F, use 10w/50.

Scott Mueller
002981
RNDOLA
<<<<<<<<<<
Interesting how all three manuals give different information:
Workshop manual:

above 14F:
15w40, 20w40, 20w50

below 14F:
15w40, 10w30, 5w20

Technical Info manual (from above post)

above 10F:
20w40, 20w50

below 10F
10w50

Owner's Manual ('82):

above 64F
20w50

2F-102F
10w20, 10w30, 10w40, 15w40, 20w40

Why can't any information here agree? Personally, i have been using mobil 
10w40, but i think i might go to mobil 1 15W40 next season. At least the 15W40 
is listed for summertime temperatures in the owner's manual AND the Workshop 
manual. I fear that 20W50 may be a little too thick for those of us in the 
upper part of the US, even if we don't drive our cars in the winter time. there 
are many days even in the summer when the temps go below 64F at night. Not 
only that, but a thicker oil will make it harder to get good gas mileage or 
maximum performance on a low compression non-race engine such as our PRV's (though 
I have to admit that the PRV is a 'loose' engine and could benefit from a 
thicker oil/longer drain intervals). 

any other thoughts? has anyone switched grades each season or oil change to 
note performance or starting differences?

Andy


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