Mixing Pennzoil to save some $$$

[Drew2000]

With the continued rise in oil prices, and to stretch my synthetic stash....I'm thinking of mixing 3qts of Yellow Pennzoil 5w20 with 3qts of Pennzoil Platnium 5w20 (truck takes 6q with filter). Probaly would make a better blend then the pre- packaged syn-blends.

Any issues with oil compatibility, or running around 7500oci miles of mixed city/hwy driving?

Drew

 

[rg200amp]

No problems what so ever.

I would run the Sytnthetic by its self tho.
Then is you cant get the synthetic on sale, run Dino oil by its self.


But if you want to mix, That would work to. If you want to go to 7500 miles, I would get a UOA to make sure your driving style supports your OCI.

 

[MarginCalled]

You could even call it a synthetic blend. Run it with confidence. Additive clash is a non-issue with those oils, particularly if they are in the same API grade

 

[Steve S]

How often do you change the syn oil .

 

[Steve S]

Originally Posted By: MarginCalled
You could even call it a synthetic blend. Run it with confidence. Additive clash is a non-issue with those oils, particularly if they are in the same API grade
What is additive clash I never have seen a bottle of common motor oil mention it is not compatible with any other oil.

 

[02zx9r]

you will not have any issues. Have heard you should always stick with the same brands when mixing but I personally dont think it matters today if you mix 6 different quarts of 5W20 together.

I ran 3 quarts penn dino 5W30 and 1.5 quarts PP 5W30 with no issues, uoa id on here

 

[rg200amp]

Originally Posted By: Steve S
Originally Posted By: MarginCalled
You could even call it a synthetic blend. Run it with confidence. Additive clash is a non-issue with those oils, particularly if they are in the same API grade
What is additive clash I never have seen a bottle of common motor oil mention it is not compatible with any other oil.


Motor oils wil mix fine. There is no issues weither they will mix. They can and will mix.

but


A oils Additives are set up to preform with that oil.

When you mix two or three diffrent brands together there additives do not work at there full power.

For example- You use X brand oil with a lot of Calcium to keep things clean.
You use Y brand oil with a lot of Moly to keep the Motor wear down.

Now you would think you got the best of both worlds when you use the two.
But all you really did was dilute the two oils so the high calcium is no longer high since its mixed with other oil, and the high moly is no longer high since its mixed with other oil.

That is Additive clash. Whet you have 2 different oils trying to use there additives to there full power, but they cant since they are mixed with another oils chemistry.

Nothing bad will happen when you mix oils, but like some people belive, you do not get a SUPER oil when you mix two oils with great additives, all you get is two diluted oils.

 

[Acroy]

watch oil prics come down now Will soon be a moot point!
ps I used Ford Motocraft Synth blend for last few years and very happy with it, around $2.50/qt, 4k OCI (on the conservative side), kept the Protege's noisy engine quite for the entire 4k.

beers

 

[Smokescreen]

Here there is only $3 difference between YB and PP so I can't justify it, but that may not be the case everywhere.

 

[demarpaint]

Originally Posted By: rg200amp

Motor oils wil mix fine. There is no issues weither they will mix. They can and will mix.

but


A oils Additives are set up to preform with that oil.

When you mix two or three diffrent brands together there additives do not work at there full power.

For example- You use X brand oil with a lot of Calcium to keep things clean.
You use Y brand oil with a lot of Moly to keep the Motor wear down.

Now you would think you got the best of both worlds when you use the two.
But all you really did was dilute the two oils so the high calcium is no longer high since its mixed with other oil, and the high moly is no longer high since its mixed with other oil.

That is Additive clash. Whet you have 2 different oils trying to use there additives to there full power, but they cant since they are mixed with another oils chemistry.

Nothing bad will happen when you mix oils, but like some people belive, you do not get a SUPER oil when you mix two oils with great additives, all you get is two diluted oils.


Although its something I wouldn't do I don't think its that bad of an idea. By mixing you're taking a little away from the synthetic, but making the conventional oil better. A trade off no doubt, but looking at it from an optimistic point of view you'll have a better conventional oil.

JMO,
Frank D

 

[scoobie]

I mix 50:50 QS 5w30 synthetic with QS 5w20 dino for Dec - March for my new Subaru Impreza NA 2.5 flat four.
My summer blend might be 1/3 synthetic, 2/3 dino. I always add 125ml shot of MoS2, for good measure. The older legacy with the piston slap gets dino 10w30 in the summer, and in the winter 50:50 HM 5w30 dino with 5w30 synthetic. It is very important to custom blend the oils. I notice that there is a cheap semisynthetic motorcraft, 5w20, that I will use next time I'm doing my Dec - March blend for my new Subaru. Always make sure the API grade is the same. My engines just love it. My wife tells me the Impreza is running SUPER quiet with the 50:50 blend there is in there right now, and my mileage keeps going up -
used to be 25 mpg when we got the car at 7000 miles, now registering 28 mpg with the very careful attention to oil and MoS2. I've also got 3 mitsubishi mirage / dodge colt, with various mileage. All 3 dodge colt get a 50:50 mix of synthetic and dino. I use the extra large filter on the colt, so I change the filter every other time, and also the Impreza is the larger
Bosch 3323 filter, so it gets changed every other time as well.
The legacy has a huge filter, so again, every other time.

 

[Drew2000]

I usually run 7-10k on the full synthetics, If I ran straight dino, figure around 5k, so I split the difference when thinking about my homemade 50-50 "blend". 50% highway/50% city/surburban.

I still have a way to go on the Synpower in the engine now, so maybe I'll wait and see what sales come up in the next month or two.

Drew

 

[RoGuE]

This thread is interesting. I have one quart left over of Pennzoil Platinum. I currently have Pennzoil Platinum in my Malibu (2007 2.2L) right now. I was planning on switching over to regular Pennzoil YB. It takes 5 quarts, so I would mix the one quart of PP with the 4 quarts of YB. How does that sound to you guys?

 

[Bill in Utah]

Originally Posted By: RoGuE
This thread is interesting. I have one quart left over of Pennzoil Platinum. I currently have Pennzoil Platinum in my Malibu (2007 2.2L) right now. I was planning on switching over to regular Pennzoil YB. It takes 5 quarts, so I would mix the one quart of PP with the 4 quarts of YB. How does that sound to you guys?


It would be fine.

If it matters..

I did a series of UOAs with the following;

Castrol GTX
Castrol Syntec
Syntec blend
50/50 mix of the blend and syntec.

I ran them in the same engine for 5k and to be honest the GTX did the best. The mix did no better than either straight.

It was a waste of money looking back but wanted to share.

Take care, bill

 

[y2k345]

I`ve got to try a mix next time I change oil.

 

[mechtech2]

scoobie - 3 MPG from your oil mix? It can't be done.

 

[Eddie]

Run the dino or the Syn. I don't see the logic of diluting the Syn. No harm but little or no gain.

 

[02zx9r]

can mola or bruce verify that mixing will cause problems or additive clashing or what not??

 

[scoobie]

We got the Impreza as a rental with 7000 miles. MPG on computer was 25. With sensible driving, MPG went up to 26. I changed the oil after putting 1000 more miles on it, with a heavy dose of MoS2.
Mileage gradually crept to 26.5 It used about 6 ounces in 6000 miles; I changed oil again, I reset the trip computer, and mileage went to 28, including lots of hwy miles. Engine is currently using not a single drop of oil, and I am using Frankenmix 50:50 synth dino 5w30 ST, with Promoly 250ml. With both changes, crank case is slightly over filled. Next change at end of Dec. with Frankenmix 5w25.

 

[SilverC6]

I would think the dino would be the control.

You are probably wasting your money adding the synthetic.