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Hummer Forums - Enthusiast Forum for Hummer Owners (https://www.hummerforums.com/forum/)
-   Hummer H2 (https://www.hummerforums.com/forum/hummer-h2-8/)
-   -   Need thicker oil? (https://www.hummerforums.com/forum/hummer-h2-8/need-thicker-oil-39909/)

mcioci 07-26-2018 03:01 PM
Originally Posted by mulepic (Post 353467)
Just got back from a 2700 mile towing trip w/ amsoil 10w-40 and filter. The pressure did increase a little. Just enough for me not to worry about it much. It would hold at 30 and stay slightly above 10 when stopped. I don't know if this had anything to do w/ it being amsoil or the weight of the oil. So the next oil change I'll go back to mobile 1 but use 10w-40.
my oil pressure is fine on my 08 but tried Royal Purple and now my engine is a little noisier than before when I used Mobile 1 religiously. Going back to Mobile 1 next time. My 05 I use a blend of synthetic and conventional castro oil It is just a tad below 40 at idle. While driving in summer for trips of over an 1-1.5 hrs it will drop down to 30 at idle.

LoJac963 07-28-2018 09:44 AM
I have always used Mobil1 in all my vehicles here in AZ where it is hot as the surface of the sun. My H2 has never had an issue, nor did I think to ever run thicker oil.


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