5W-30 motor oil

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5k on 5w30 for me; about to do my second oil change and staying with 5w30.
 
Mobile 1 5w-30 has quite a bit higher viscosity and a decently good additive package.

Here is the Pennzoil:


Personally I would run the 0w-30 esp euro mobile 1. 5w-30 mobile 1 if I was worried about warranty.

If I was worried about warranty and wanted to be slick I would run mobile1 0w-20 5 quarts and mix 2.7 of a heavier mobile 1 in. Requires a lot of DIY.
 
As far as how its running on 5w-30, it’s smoother still. Put about 900 so miles on if I IIRC. Been driving my f250 a lot as i have been moving my skidsteer around. Could be a fluke that I hit 14k miles as i changed it and that was a magic number that day where the engine broke in.

But I do think its sensitive on viscosity. I can pull it out of my climate controlled garage and later in the day feel a difference as the temps climb up to the high 90s. It started getting hot here in the last couple months.

I have pretty extensive background around heavy machinery and manufacturing. Owner and operator. Watched my dad be able to put his hand on a CNC machine and know when it was ready to be taken out of service or moved into lower precision machining etc. Blah blah blah.

I may be crazy but I think all the fluids in these, besides the diffs, are extra thin for MPG cool-aide drinkers. The tuning is also horrible.
 
Yesterday, I took my 24 LX600 in for its 35K oil change and had them use 5W-30W Amzoil that I provided, along with an Amzoil filter. I also had them take a sample of my old oil with 5K miles on it (5w-20w) so I could send it to Blackstone for analysis. They did not say anything about me using 5W-30W. I was a bit surprised that my oil pressure didn't seem to increase with the new oil.
It will be interesting to see if my mpg decreases.

Edit: I just got back from about a 250 mile trip on I-35 with the 5w-30w and according to the car's MPG average, I got 23.6 driving between 75-85. That may be better than I got with the 0w-20.
 
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