Can these oils be mixed when getting an oil change

Pennzoil motor oil
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Danny_Tanner

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I have a 2012 Ford Fusion Sport FWD 3.5L The manufacturer recommended oil is Motorcraft 5W-20 Synthetic Blend Motor Oil (XO5W20QSP)

Instead of using the manufacturers recommended Motorcraft 5W-20 Synthetic Blend Motor Oil

Can I use a mixture of these two oils?

(SUPR520) 5W20 Chevron Supreme API SN = 2.5 quarts and (CHS520) 5W20 Synthetic Chevron/Havoline A = 3 Quarts

Thank you in advance for your help on this.

Danny
 
I would stick with the manufacturer's oil weight and API recommendation through the life of the warranty. No need to stick with Motorcraft. Sounds like your blend should be perfectly fine.
 
Originally Posted By: Chewie
I would stick with the manufacturer's oil weight and API recommendation through the life of the warranty. No need to stick with Motorcraft. Sounds like your blend should be perfectly fine.


+1. For a minute I thought I'd see some 20w-50 in there.
 
Any mixture of the correct grade is fine as long as they are API certified oils.
Welcome to this crazy place.
 
Your blend should be A-OK!

I remember going to a Midas for an oil change and being asked if I wanted to upgrade to a synthetic blend or a Full Synthetic...I asked for a Full Synthetic and was warned that would mean I could never go back to conventional oil. I asked how they could offer a synthetic blend if that were really the case and was rewarded with a blank stare...
 
Its fine and will work as intended. You'll end up with more syn oil in your mix then the semi-syn you are comparing it too.
 
I just learned from a concurrent thread that the 5W20 Chevron Supreme is already a synthetic blend, so you're going to be getting close to a Full Synthetic in your mix!!
 
Originally Posted By: JC1
For a minute I thought I'd see some 20w-50 in there.


I have 13 quarts of Synpower 20w50. I was thinking of mixing 1 quart with 3 quarts of Napa synthetic 0w20 for the 05 Matrix which specs 5w30. What say you? And all else as well.
 
That blend will be fine. No different that topping off on an extended road trip
smile.gif
 
Yes mix away and no harm. Also, no shortening of your OCI needed. Will last the same length, as if it were one manufacturer and one grade.

I did it for over 20 years..... maybe close to 25. Now the closest I come to mixing is on my Colorado. It holds 6qts. So I feed it a five quart jug and one quart of something else I have from my wife's oil container. Her vehicle holds 4.5 quarts. So I usually have 1-2 half-quart leftovers laying around. She puts on 2-3 times the miles I do, while I stay at home retired. So I do her oil changes often.

I might drive 5K per year. She drives 15K. But all this mixing is slowly coming to an end. I've become a Valvoline lover, ever since I got stiffed twice by SOPUS on rebates I never received. So my 30+ years marriage to Pennzoil and Shell went thru divorce court last year.
 
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In my 2010 Fusion, I've run all sorts of crazy mixes for various OCIs, including one that was a mix of conventional 5w20, high-mileage 5w30, and Rotella T5 15w40.. and each time I've run a used oil analysis (including on the frankenbrew I just listed), it's come back amazing. I run 7,500 miles OCIs on these mixes.

Granted, my Fusion has the 2.5 I4, and yours has the 3.5.. but I would expect the 3.5 to be able to bear odd oil mixtures better.

Also, since the mix you're talking about is using two oils from the same manufacturer, I would expect the add packs to be pretty comparable. Mix away.

.. and as others have noted, the Chevron Supreme is already part syn, so you're in good shape even if you just ran that.
 
The reason I asked this question is that I made the mistake of going to a drive through oil stop.
I asked for manufacturers recommended Motorcraft 5W-20 Synthetic Blend Motor Oil,
what I ended up getting was (SUPR520) 5W20 Chevron Supreme API SN = 2.5 quarts (out of the bulk oil gun)
and (CHS520) 5W20 Synthetic Chevron/Havoline A = 3 Quarts (out of quart bottles)

I have never had any problem with my car since I bought it. 10 mins after I leave the oil stop, my engine starts making a ticking / knocking sound. I go back to the oil stop and the manager comes out hears the noise, tells me he is not a mechanic. He says that I should take it to a mechanic to find out what is making the noise.
The owner of the shop I took the car to, tells me that the wrong oil was put in the car. They did an oil change with manufacturer recommended oil and filter. The ticking / knocking sound was gone.
I contacted Chevron Corporate offices this morning and spoke with the oil (lubricants) tech department. I asked if when changing the oil, it was ok to use this oil combination and if they were designed to mix together like this. He told me that Chevron would advise against mixing these 2 oil types together in an oil change. Topping it off is fine but not a full oil change. He told me that he has not heard of an oil change shop doing this.

From what everyone here says, it should not be a problem. Any thoughts on this would be appreciated.
I apologize for not posting this info to start with but I was on my way out of town when posting this last night.
One last thing, when I asked the manager why they mixed their own blend instead of the oil that I asked for, he told me that they did not have that oil or any synthetic blend. They mix their own synthetic blend and have been doing it for 3 years now. He also told me that I was only the 3rd person to bring it up to him.

You guys are the experts and I value your opinions. I know I made a mistake by going to an oil stop in the first place. I have been kicking myself in the a$$ ever since! If a person goes to a shop for an oil change and asks for a specific type of synthetic blend, is it ok for that shop to just mix their own synthetic blend?
Could their bulk supreme oil possibly not be supreme?

Sorry for the long rant, I am just frustrated, [censored] off at myself and my lack of knowledge in this area. I will be learning as much as I can on this subject asap.
Thanks again everyone.
 
The way I see it, the issue you're talking about was almost certainly due to the FILTER they used - It was either a faulty filter, was put on wrong, or something like that.

The oil mixture described should in no way cause the problem you've described, and I can see no reason why simply changing out that oil would immediately cause the ticking/knocking to stop.

Filter - I'd bet money on it.
 
+1
This was almost certainly an oil filter problem.
A blend of oils won't cause any noticeable problems.
While not my first recommendation, too many people run crazy blends with no problems.
 
Originally Posted By: Chewie
I would stick with the manufacturer's oil weight and API recommendation through the life of the warranty. No need to stick with Motorcraft. Sounds like your blend should be perfectly fine.

Agree....MOTORCRAFTis an excellent product. After warranty, you can switch to another good major brand seni-syn.....such as Pennzoil Gold or Quaker State Semi-Syn (blend).

OR.....move to a full Santhetic...... for longer OCI's.
 
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