M1 EP HM 5w30
What's the best oil for my use case?
- Thread starter cwilliamsws6
- Start date
Not in a smog check area thankfully but how would Royal Purple affect that?
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Deleted member 89374
It wouldn't affect emissions. Royal Purple HPS is just regular Group III oil with a higher than normal amount of ZDDP. Unless you got a V8 from the 60s or 70s, it's not very useful. A small minority might argue that it's awesome. That minority is shrinking every year because Calumet, the owners of Royal Purple, has cut just about every corner they could. They also haven't updated their formulations to improve them, but rather to cut costs. It's beyond me why there are still people here who recommend Royal Purple, as it doesn't excel at anything. Pennzoil Ultra Platinum would be a better option, so would be Mobil 1.
High ZDDP. If your engine is tired with some excess blow by, It could kill your CAT's early.
Not true. it's a group 4. The RP API stuff is Group 3, and not very good oil.
It's beyond me why there are still people here who talk trash, yet have no clue on the topic.
I have a Pathfinder like yours and used to change oil every 6 month (5w30 cheap approved conventional ), now I use M1 0w20ep and change it once per year. It cost the same and I spend less time under the car. I do approximately 10-12k mi per year.
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Deleted member 89374
Then please show some proof. An FTIR analasys of a product sample would be a good start.
Again, show some proof that Royal Purple HPS is a modern product made with high-quality and high-perfprmance ingredients.
OVERKILL
$100 Site Donor 2021
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Deleted member 89374
Thanks for digging that up.
If you buy a jug of Magnatec or GTX and add four fluid ounces of Red Line break-in additive, you will get Royal Purple HPS, crappy 14% NOACK and all, minus the dark purple die.
High tbn oils usually have a higher additive package in them. It's what brings the base number up. There are tbn boosting additives that are just 9999+ ppm calcium additives like this one https://bobistheoilguy.com/forums/threads/bg-products-moa-oil-additive-voa.70404/
I'm curious as to where that conclusion was drawn, from what I can find the last published viscosity index of Mobil 1 EP or Mobil 1 AP 0W20 was over 170, don't the PAOs in the viscosity range useful for making motor oil typically have a VI somewhere in the 130-150 range, and I'm sure most additives worsen the VI, and AN certainly does.
But the real question is if you've been changing your cvt fluid every 50k or sooner. Also supertech advanced full syn is only $19.98 for a limited time. I already bought 6 jugs on sunday to do the first diy change on my 21 soon. I'll Probably use them for two olm resets as it would be about 8-9k.
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Deleted member 89374
They no longer publish the viscosity index. @OVERKILL calculated it a while back (~130) using a viscosity calculator. In addition to that, I found a UOA on a Mazda forum where KV @ 40C was 52 cSt, which lines up with the official number of 55. It's basically a monograde blended from PAO, ANs, and the additive package. It's awesome engine oil, truly a bargain for what it is. Let's hope Mobil keeps making it for years to come.
OVERKILL
$100 Site Donor 2021
It's a calculated VI based on the most recent PDS which a few members have taken issue with. I've directed a query to Mobil to confirm the accuracy, it was passed up the chain but I have not heard back yet beyond that correspondence.
OVERKILL
$100 Site Donor 2021
And to add, the 5w-30 is the only grade that shows any PAO. The 10w-40 and 20w-50, like the 5w-20, don't show any on the SDS.
Here is the 5w-30, which has 10-25% PAO, the rest is all Group III:
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Deleted member 89374
Hardly worth buying because Castrol EDGE 0W-40 costs an arm and a leg these days.
The HPS and HMX have 3.3 & 3.8 HTHS. I have looked into the HMX. The Walmart RP is junk.