mixing PYB with PUP will give me semi-synthetic?

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Thugzy

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My local CT does not carry any more semi-synthetics on the shelf. Only Conventional and synthetic. I'm going to change out the FF from my new CX9 Turbo and want to go Semi for the next 2 changes and then PUP for the 3rd.

So if I mix PYB and PUP should I get a semi?

Thanks
 
Originally Posted By: Thugzy
My local CT does not carry any more semi-synthetics on the shelf. Only Conventional and synthetic. I'm going to change out the FF from my new CX9 Turbo and want to go Semi for the next 2 changes and then PUP for the 3rd.

So if I mix PYB and PUP should I get a semi?

Thanks


What ratio are you planning on using?
 
50/50 is the worst way to make a blend. You should either have a majority of conventional or a majority of synthetic.
 
Originally Posted By: KingCake
50/50 is the worst way to make a blend. You should either have a majority of conventional or a majority of synthetic.
If memory serves Pennzoil Gold is 50/50.
 
Originally Posted By: KingCake
50/50 is the worst way to make a blend. You should either have a majority of conventional or a majority of synthetic.


Just wondering why you feel 50/50 isn't optimal?
 
The PUP is on sale now at CT stores. If I were you, I would just grab 3 or 4 jugs and you're good for 2 or 3 years. This oil can last at least one year or 15k KM. With the 10$/jug rebate, you're going to pay only 21$/Jug.

With longer OCI, I think, at the end, you're winner with only PUP instead of mixing dino with synth.
 
+1 @ ST2008
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I personally think that mix will be fine, even at 50:50

However this idea of, not starting a new engine on a full synthetic, comes from the 90's when full synthetics were PAO and Esters. Most modern synthetics are now Group 3 based, with Pennzoil being GTL Group 3+ based.

Most conventionals are now Group 2 based.

Given that both Group 2 and Group 3 are both HydroCracked mineral oil, with just the treatment severity being different, I don't think either is much or a concern for a new engine.

Chevron make an IsoSyn semi-synthetic, which I believe is just a HC treatment rate, more than a typical Grp 2 but less than a typical Grp 3. Others make a semi-syn by mixing Grp 2 & Grp 3 together.

Just saying the old rules of thumb haven't kept pace with the modern chemistry / production techniques / marketing terms. Do what makes you feel most comfortable. Nothing wrong with going straight to PUP after the FF.
 
Can I go straight to PUP after 2000kms? I typically change out my FF at this interval with all my new cars
 
Sure - done early changes with Mobil 1 for decades - and look how many serious engines used that for FF over the years.
Going straight to Platinum is not a problem at all ... Enjoy the new ride !
 
Thanks to everyone for their input!

Originally Posted By: 4WD
Sure - done early changes with Mobil 1 for decades - and look how many serious engines used that for FF over the years.
Going straight to Platinum is not a problem at all ... Enjoy the new ride !
 
I had a new Honda motorcycle. Dropped the FF at 1000 KM and went straight to Castrol Edge 10W60, a PAO based full synthetic.

Rode the bike hard for the next 10 years, all on Castrol Edge 10W60, no problems at all.

I think most of the new wear in happens in the first few 100KM, so at 2000KM you are good to go. IMO
 
Originally Posted By: Marco620
Well after filter and oil you are at 5.1 qts of 5w30. 3qts PUP,2.1 qt PYB


Curiosity got the better of me... why 5.1 qt? Why not just 5 and call it a day?
 
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