- Joined
- Aug 6, 2012
- Messages
- 313
Quaker State 5w30 SP
- Thread starter The_Captain
- Start date
They kept the phosphorus below 800 ppm which is still required with SP but still ended up with 900 ppm for zinc which is great. Good shot of Moly. Vis is 10.4 cSt which is great for the thickie crowd, higher than Pennzoil Platinum 5w30. 
The higher the number, the thicker the oil, yes? I can never remember.
Yep. The thickest 5W30s I've seen from VOA results are:
Mobil 1 Extended Performance High Mileage 11.6
Kirkland Full Synthetic 11.6
Supertech Advanced Full Synthetic 11.5
It's not always that VOAs line up with published specs. A recent one that's been talked about on here is Mobil 1 0W20 phosphorus and zinc levels. If the results of this VOA are accurate, then Quaker State may be overstating their viscosity for this oil. There's really no practical way to know for sure, but if multiple oil analyses give similar results, (as was the case for Mobil 1 0W20), that would increase the confidence level of these results.
I’m curious about the durability of this oil. It might be great new, but lose performance quickly. Still serviceable if used within normal service intervals, just not producing these outstanding numbers after 5000 miles.
I’ve been running this oil on my k20. I have an oil temp/pressure gauge, and after about 3000 miles I’ve noticed the oil suddenly heats up quicker and gets up to higher temps when running the engine hard. It didn’t do this when new.
That might be the difference between Quaker state and pennzoil. Pennzoil might hold its performance longer, while Quaker state’s might fall off quicker. The great numbers might simply be a quirk of the formulation. And it would also be strange that Shell would make their second tier brand better than their top tier brand.
I’ve been running this oil on my k20. I have an oil temp/pressure gauge, and after about 3000 miles I’ve noticed the oil suddenly heats up quicker and gets up to higher temps when running the engine hard. It didn’t do this when new.
That might be the difference between Quaker state and pennzoil. Pennzoil might hold its performance longer, while Quaker state’s might fall off quicker. The great numbers might simply be a quirk of the formulation. And it would also be strange that Shell would make their second tier brand better than their top tier brand.
*Good slug of calcium too (1403) at the higher end for good cleaning and non - LSPI concerns. This is my choice for aa lower cost synthetic 5W30 ideal for <5K mile OCI for GDI engines and I prefer over the other SOPUS Pennzoil Platinum or Pennzoil Ultra Platinum for thickness and moly content . ... Is there anything bad to say about this oil ?They kept the phosphorus below 800 ppm which is still required with SP but still ended up with 900 ppm for zinc which is great. Good shot of Moly. Vis is 10.4 cSt which is great for the thickie crowd, higher than Pennzoil Platinum 5w30.
His website is a complete sewer of misinformation and is capped with a deeply ignorant disregard of proper testing methods. Many threads on here discussing it in detail and illustrating his fraudulent claims. The bottom line with his miserable data is that when properly analyzed no oil "tests" any better or worse than any other, the numbers he posts are utterly meaningless. All oils test the same.
It's actually worse than that but this the most easily identifiable fallacy in his effort.
I agree 5w30 in a lot of Fords can be used because they were only using 5W20 because of government standards..
Well, no SAE grade oil is going to cause harm as long as the winter rating is not inappropriate for the starting conditions. Engines aren't harmed by a higher HT/HS but they can be harmed by one that is too low.
Oh okay, technically 5W30 was always a good year round oil for the most part. Until they started coming out with 5w-20s and everything else, for fuel mileage.. what's your opinion on Quaker State
I'm not big on opinions. I go by what approvals, specifications and licenses the oil holds or does not hold, a PDS with typical values means little to me. For me that's reading the tea leaves but the other things I mentioned are proven indicators of real-world performance.
I've never really understood how to predict performance from a "slug of moly" or "dose of boron" but maybe that's just me.
I guess you have personally never used it?
Quaker State? Sure, it was on sale at Menards once and got some. It worked fine. I also used it in the Accord for a while.
That's probably why they got rid of Rotella gas and truck..
There's nothing scientific about this but my 188k Hyundai was fed a steady diet of QS advanced durability for it's first 100k, and it's always runs extremely quiet on any variety of QS.
What made you switch it?
Who is "they?"
Similar threads
