Question on Synthetic 5-30W and 5-20W - JeepForum.com

 
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post #1 of 8 Old 07-13-2010, 02:15 PM Thread Starter
bobbarto
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Question on Synthetic 5-30W and 5-20W

I have 2009 and using Mobil 1 Synthetic 5-30W Motor Oil for a year. I was reading the manual last week and it stated to use 5-20W. I went to four auto stores looking for a one Gallon Jug of 5-20W and only can find 5-20W in quarts, which will cost more money. I found one Gallon Jugs of Mobil 1 Synthetic 5-30W Motor Oil in all the stores, but none of 5-20W.
Is there much of a difference if I stay with 5-30W instead of going crazy trying to find one Gallon Jug of 5-20W?


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Bobbarto

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post #2 of 8 Old 07-13-2010, 04:07 PM
Dave_B
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Wally has it $21 a jug. Bought it yesterday.

Dave

Lovin' my CARBON FOOT PRINT!
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post #3 of 8 Old 07-13-2010, 04:19 PM Thread Starter
bobbarto
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I don't have a Wally in my area

I don't have a Wally in my area. Anyway, the questions I'm asking are below.

I have 2009 and using Mobil 1 Synthetic 5-30W Motor Oil for a year. I was reading the manual last week and it stated to use 5-20W. I went to four auto stores looking for a one Gallon Jug of 5-20W and only can find 5-20W in quarts, which will cost more money. I found one Gallon Jugs of Mobil 1 Synthetic 5-30W Motor Oil in all the stores, but none of 5-20W.
Is there much of a difference if I stay with 5-30W instead of going crazy trying to find one Gallon Jug of 5-20W?


Thanks for the replies back,
Bobbarto
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post #4 of 8 Old 07-13-2010, 05:26 PM
coder
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I would not use 5-30W in your engine. Many newer valve guides, and other internal parts require the thinner oil or they aren't lubed properly.
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post #5 of 8 Old 07-13-2010, 08:10 PM
Dave_B
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5W20 is recommended because you get slightly better fuel economy. The only reason.

Dave

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post #6 of 8 Old 07-13-2010, 09:05 PM
tjkj2002
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Quote:
Originally Posted by coder View Post
I would not use 5-30W in your engine. Many newer valve guides, and other internal parts require the thinner oil or they aren't lubed properly.
Not relevant for the 3.7 V6.

Quote:
Originally Posted by Dave_B View Post
5W20 is recommended because you get slightly better fuel economy. The only reason.

Dave
100% correct,just to satisfy CARB which by the way was just increased for '16 model years by almost 10mpgs(to over 30mpg's now,thanks obama).

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #7 of 8 Old 07-14-2010, 06:55 AM
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its not that much difference with the synthetic oil imho. in my experience once i switches to syn 5w20 i can hear valves tapping more clearly especially when the engine is cold. i still use only 5w20 not to void the warranty and they also claim that thinner oils provide better gas mileage. i have never seen a 1 gallon jug of 5w20 either but i get 5 bottles and a mobil1 filter from local autozone for around 30$
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post #8 of 8 Old 07-14-2010, 10:37 AM
Elt31987
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Quote:
Originally Posted by VMF View Post
its not that much difference with the synthetic oil imho. in my experience once i switches to syn 5w20 i can hear valves tapping more clearly especially when the engine is cold. i still use only 5w20 not to void the warranty and they also claim that thinner oils provide better gas mileage. i have never seen a 1 gallon jug of 5w20 either but i get 5 bottles and a mobil1 filter from local autozone for around 30$
X2 I get Mobil 1 5w20 and the Mobil 1 filter for 30 bucks at autozone and advanceauto

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Last edited by Elt31987; 07-14-2010 at 10:50 AM.
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