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oil

529 views 12 replies 7 participants last post by  kmann 
#1 ·
i have an 03 deville base ... was wondering if i can use synthetic blend or full also heard that models before 2010 dont really need the Dexos 2. is this correct?
 
#4 ·
Yup ^ ^ ^ DEXOS is a GM-specified oil minimum performance standard. Every recognized name brand engine oil on the market worldwide meets the specs. "DEXOS" is strictly a GM boondoggle to force oil packagers to send money for "licensing".

Use whatever engine oil floats your boat - but synthetic or blend 5W-30 is what came from the "factory" in your engine. Look at the oil fill cap.
 
#6 ·
cap just says 5w-30 nothing about synth or non synth.

You can use either one, synthetic, synthetic blend or even full conventional. GM calls for 5W30, but I still run 10W30.
Dexos is just a GM oil. You can use that as well if you wish, but not needed.
thanks.

OIL WAR! -
haven't had a good one in MONTHS!

FIRST - to answer your questions -

YES - you CAN use a synthetic blend - OR a FULL synthetic -
BUT - you will gain absolutely NOTHING - except under the MOST EXTREME conditions -

I have used Valvoline - conventional oil - EXCLUSIVELY - for the last 50 YEARS -
and I have NEVER had an oil-related engine problem -

NOTE - I do use Valvoline full synthetic in my lawn tractor and lawn mower -
air-cooled motors run a LOT hotter -
I also use it in my snowblower -
thanks.


thanks.

You can use either one, synthetic, synthetic blend or even full conventional. GM calls for 5W30, but I still run 10W30.
Dexos is just a GM oil. You can use that as well if you wish, but not needed.
thanks.
 
#5 ·
OIL WAR! -
haven't had a good one in MONTHS!

FIRST - to answer your questions -

YES - you CAN use a synthetic blend - OR a FULL synthetic -
BUT - you will gain absolutely NOTHING - except under the MOST EXTREME conditions -

I have used Valvoline - conventional oil - EXCLUSIVELY - for the last 50 YEARS -
and I have NEVER had an oil-related engine problem -

NOTE - I do use Valvoline full synthetic in my lawn tractor and lawn mower -
air-cooled motors run a LOT hotter -
I also use it in my snowblower -
 
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