Mixing oil
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Laughing Gas
Joined: Mar 2018
Posts: 1,242
Likes: 273
From: South Central Indiana
Mixing oil
I'm getting ready to do another oil change on my '17 F-250 with the 6.2L engine. Since new I've always used the Motorcraft 5w-30 semisyn. When at Walmart today they had the 5qt Motorcraft semisyn but no quarts to get to the 7 needed so I bought 2 quarts of Valvoline 5w-30 semisyn to add to the Motorcraft oil. Is this ok? I would have done the entire oil change with Valvoline but of course they were out of the 5 qt jug of that as well.
Senior User
Joined: Feb 2004
Posts: 428
Likes: 16
From: Northeast PA
Much along the lines of the video above, Back a long long time ago, when I thought I wanted to make a living in the automotive world, while in school I asked my engine lab instructor who I greatly looked up to (and always did long after school) "Mr Pickering, what is the best type of oil to use in an engine",,, he said "Mr Pettinato,,, the best oil to use is clean oil".
He wasnt being flip, what he explained to my younger self was that modern oils are so good, that keep it clean and they will all do a great job.
He wasnt being flip, what he explained to my younger self was that modern oils are so good, that keep it clean and they will all do a great job.
Hotshot
Joined: Mar 2017
Posts: 10,156
Likes: 1,369
From: Chaz
I wouldn’t worry about that, won’t hurt anything.
I worked at a shop in high school a couple years, I got to do around 100 oil changes a week. The only thing I noticed about brands is if you change them often I noticed those cars leaked. Cars that would come in and have a different oil change sticker almost everytime.
Also switching to synthetic after 30k or so miles would cause leaks I thought.
Granted that was almost 20 years ago and now manufacturers have more control of what the specs are.
I worked at a shop in high school a couple years, I got to do around 100 oil changes a week. The only thing I noticed about brands is if you change them often I noticed those cars leaked. Cars that would come in and have a different oil change sticker almost everytime.
Also switching to synthetic after 30k or so miles would cause leaks I thought.
Granted that was almost 20 years ago and now manufacturers have more control of what the specs are.
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Mountain Pass
Joined: Sep 2019
Posts: 241
Likes: 12
From: Kansas
While I fully understand the engine doesn’t know the difference, I don’t think I could handle mixing oils. I have considered mixing weights of the same brand and formula, but even that torques my psyche.
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