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Old 04-07-2022, 10:25 PM   #1 (permalink)
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Saturn 1.9 sohc oil viscosity vs mpg

It's coming up onto time to do a service on the poor Saturn

I am wondering if there is the potential for some low hanging mpg fruit to go down to a 5/20 full synthetic over the 5/30 conventional I'm sure is in the car.

I plan to also service the manual trans was well.

Thoughts

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Old 04-08-2022, 12:15 AM   #2 (permalink)
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Quote:
Originally Posted by R.W.Dale View Post
It's coming up onto time to do a service on the poor Saturn

I am wondering if there is the potential for some low hanging mpg fruit to go down to a 5/20 full synthetic over the 5/30 conventional I'm sure is in the car.

I plan to also service the manual trans was well.

Thoughts
No idea but apparently some tests show 1-3 percent improvement in mpg. Saw this at the store too versus regular synthetic
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Old 04-08-2022, 01:37 AM   #3 (permalink)
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Know the Saturn's requirements. are they finicky?

www.yourmechanic.com/article/a-guide-to-motor-oil-additives_2
Quote:
Additives in motor oils
Motor oil typically contains a Performance Additive Package that can make up 15% to 25% of its composition. The remaining percentage is base oil. The additives help to enhance the performance and viscosity of the motor oil. Oil manufacturers design their products to comply with the specifications of car companies and engine manufacturers.
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Old 04-08-2022, 07:43 AM   #4 (permalink)
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They have a propensity to use oil profusely due to insufficient oil drain back holes in the pistons oil control ring groove. Mine is so so in that's respect.

So let's not act like the manufacturer actually had everything completely figured out in this case.

Plus it's a $600 car so....eh
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Old 04-09-2022, 10:38 AM   #5 (permalink)
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I'd at least drop down to a 0w. Best I can tell, it's superior to a 5wXX in every respect. I've known a few engines to burn a bit of oil when cold when dropping to a lower winter weight, but everything I know about oil tells me it should be doing a better job of protecting the engine, in addition to improving economy.
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Old 04-10-2022, 10:05 AM   #6 (permalink)
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I would think that as the engine has aged, tolerances have increased not decreased? Also, full synthetic is downright cheap if you know where to buy. I get mine at Costco, $30 for (2) 5 quart jugs.

https://www.dragzine.com/news/what-i...l-viscosities/

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Last edited by ksa8907; 04-10-2022 at 10:11 AM..
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