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Discussion Starter · #1 ·
Ive been using 10w30 oil in the 2007 g6 since 156k miles to 182k miles its currently at. Someone told me to use 5w30 if thats what the manufacturer recommends for cold start lubrication.
Which weight oil do you use on your 3.5 g6?
 

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Discussion Starter · #3 · (Edited)
Ok i may exchange the 10w30 for the 5w30. My grandparents always had the oil changed at specific oil change specialists such as walmart i think. My grandmother passed away in nov 2015 i think the car was around 156k-160k ive been using 10w30 but its 70-107 degrees year round in texas for the 2-3 winter months its 60s-30s the coldest.

As walmart stopped carrying their 12.97$ supertech conventional oil which i was using since 2017-2020 and oil change every 3k miles last year i was forced into using their 16$ synthetic blend 5k mile oil. This year they dont carry the supertech synthetic blend only supertech full synthetic and advanced full synthetic 10k-20k miles from the label advertisement.
The next cheapest option is quaker state all mileage conventional at 17.97$ so i just use purchased that for this years oil change. I purchased 10w30 but may return it for a 5w30

I thought maybe higher mileage cars maybe used thicker oil to make up for bearing wear and such?
Quaker State 5W-30 All Mileage Motor Oil, 5 Quart - Walmart.com

Liquid Green Automotive cleaning Fluid Automotive care
 

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Personally, I generally use the Supertech high milage full synthetic when they have it or just the regular full synthetic. I also choose to run the oil longer, but I am from a European country where this would be considered normal. And clearly this is just what I choose to do, I have no argument that others will have a different opinion. Some of the most divisive threads I have seen are over the best oil and the ideal service intervals. Your car, your choice :)
 

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Discussion Starter · #5 ·
Personally, I generally use the Supertech high milage full synthetic when they have it or just the regular full synthetic. I also choose to run the oil longer, but I am from a European country where this would be considered normal. And clearly this is just what I choose to do, I have no argument that others will have a different opinion. Some of the most divisive threads I have seen are over the best oil and the ideal service intervals. Your car, your choice :)
I agree the longer the oil lasts the better and less frequent 3k mile oil changes. They got rid of the 12.97$ 5 quart jug of supertech conventional and just last year the 16$ supertech synthetic blend 5k mile oil. All thats left is the 21$ supertech full synthetic 10k mile oil and advanced full synthetic 20k mile oil from what i see on walmarts shelf just yesterday.
The supertech oil filters now say 10k miles on them as for 3.42$ as well as frams TG 10k mile for 4.16$.
 

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In MY OPINION ....
with the year round temps you post of in your area AND such miles on the car. I would run FULL SYNTHETIC HIGH MILEAGE 10w-30 I can get Valvoline in such fairly reasonable at Walmart.
My 3.5eng. GT ran on it year round and so do my other rides,being all are over 150k miles.

YES the "purists" will DENOUNCE me for not following "the book".! LOL🚓
 

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Discussion Starter · #8 ·
Ah man i thought of 10w30 as a better oil too at 182k people recommended i use 5w30 so i switched. I was using 10w30 the last 30k miles last 5 years. I used conventional 3k mile oil changes and synthetic blend. The full synthetic is used in my 99 corvette ls1 and 06 saab 9-5 turbo.

Are you saying to use 10w30 in the 07 g6 as i was already using vs what the manual says to use. Its almost winter time but summer time gets up to 107 degrees maybe 10w30 then?
Someone told me on a different forum i could total out the engine by not using factory specification recommended oil what made me return the 10w30 for a 5w30.
 

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If you were to look up my profile page and then a map, you would find that I reside near BUFFALO NY. We get winter with temps near or below 0*f. depending on how harsh "Mother Nature"gets!
As far as your oil leak on another thread ... The common areas for leaks are the Valve covers, oil pressure switch and the oil filter adapter to block gaskets. Mine did not have the low oil LEVEL sensor.
 
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