PYB vs Castrol GTX

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Pennzoil Yellow Bottle (PYB) SN/GF-5 formulation because it's loaded with moly (269 ppm, possibly Infineum's trinuclear type as it's co-owned by Shell and Exxon-Mobil) and boron (109 ppm) friction modifiers. You will see a noticeable difference in horsepower, engine response, and fuel economy when you have so much friction modifiers. When I tried it, the feel of the throttle was incredible at take-offs. See the VOA comparisons at PQI America.
 
Originally Posted By: cjohns79ut
Which one and why?
Whatever is cheaper and/or more available. I'm partial to PYB and like their latest specs on their SN/GF-5 5w-30. The GTX is no slouch, either, though, and I've used that for a lot of years, too. I know down south that GTX is often more expensive. Up here at our Walmarts, it's just about impossible to pay regular price for GTX; it's always on rollback and has been for over a year.
 
Originally Posted By: cjohns79ut
Which oil cleans better?
From the VOAs, PYB cleans much better as it has 41% more Ca detergents than Castrol GTX and 17% more Mg detergents.
 
Originally Posted By: cjohns79ut
Which oil cleans better?
Depends who you ask. SOPUS is proud of their cleaning abilities. BP has certainly been pushing the issue in their advertising campaigns. I think the general feeling is that PYB has the edge, but that's far from scientific. Both PYB and GTX, in the appropriate grades, are SN/GF-5 and both will do the job admirably. I like the PYB additive pack better, but that's just me. I also got a bunch on a killer deal. Right now, though, the GTX would be cheaper for me. If you put me on the spot and both oils were the exact same price for the same bottle size and same certifications, I'd grab the PYB. Realistically, though, under factory specified OCIs and for the normal life of a vehicle, I don't think either oil would have a significant advantage. Go with price and availability. South of the border, I suspect that's PYB. Up here, well, we're bizarro land at times, and things are different. You can't swing a dead cat without hitting a bottle of GTX up here, and one on rollback, to boot.
 
Whatever is the better price. Both will do what you need to to perfectly well. I have to choose 1? PYB, as it has more 'stuff' in it....
 
Originally Posted By: cjohns79ut
What about Pennzoil High Mileage or is that just a rip off?
I am personally hesitant to put "high mileage" labeled oils even though I have a high-mileage (238,000 miles and counting) car. Some people will disagree. My thinking is that every engine is high mileage after the break-in period and every oil is meant to offer great protection for every engine. One concern is that large amounts of seal swellers found in high-mileage oils could end up damaging your good seals. That's probably the biggest risk with HM oils. They tend to have slightly higher ZDDP and HTHS viscosity for better wear protection but then if you want to get that, you can also use an HDEO. Of course, higher HTHS viscosity also means lower fuel economy, as it's always a compromise there. I wouldn't use HM oils, but that's me. A lot of people use them and chances are that it usually doesn't do harm but then probably provides no significant benefit over a regular latest-API-category oil either.
 
Originally Posted By: Gokhan
I am personally hesitant to put "high mileage" labeled oils even though I have a high-mileage (238,000 miles and counting) car.
Agreed. I only used high mileage oils when I had a problem (a leak) to address, until it was actually fixed. High mileage oil helped for that, but if it isn't necessary, why spend more?
 
Originally Posted By: Gokhan
One concern is that large amounts of seal swellers found in high-mileage oils could end up damaging your good seals. That's probably the biggest risk with HM oils. They tend to have slightly higher ZDDP and HTHS viscosity for better wear protection but then if you want to get that, you can also use an HDEO. Of course, higher HTHS viscosity also means lower fuel economy, as it's always a compromise there.
Where are you getting your facts at that suggest the swell agents in a HM oil damage "good seals" And the MPG loss because of the HTHS is marginal at best, you will not see more than a 2% mpg + or - if you are using the proper grade, which is maybe 1 or 2, you have a larger margin of error when calculating your MPG than what the viscosity is going to change.
 
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Originally Posted By: Gokhan
Pennzoil Yellow Bottle (PYB) SN/GF-5 formulation because it's loaded with moly (269 ppm, possibly Infineum's trinuclear type as it's co-owned by Shell and Exxon-Mobil) and boron (109 ppm) friction modifiers. You will see a noticeable difference in horsepower, engine response, and fuel economy when you have so much friction modifiers. When I tried it, the feel of the throttle was incredible at take-offs. See the VOA comparisons at PQI America.
Yeah,OK.
 
Either. GTX is usually more expensive than PYB, so I'd go with PYB. At the same price, PYB appears to be an especially good oil, so I'd probably choose it. I'd have no problem with either oil in the right grade in any of my cars.
 
Castrol now has a $7 rebate per 5 qt. through the end on Nov(?). I recently bought 4 5qt jugs of GTX. Two rebates per address. Quite honestly its the first Castrol motor oil I've ever purchased, and have never used Pennzoil, but with a $7 MIR its pretty hard to beat.
 
Use what ever is the best price. I loaded up with PYB and Castrol GTX, (and a lot of other oils), when Kmart had the Gallon Jugs on clearance. The reason I loaded up with PYB at Kmart was because....... Even though the PYB jugs are SM, GF-4.....IMO they contain SN, GF-5 because of the dates they were filled by SOPUS. All of the PYB gallon jugs were filled by SOPUS between November 2010 to January 2011. SOPUS had already converted all their PYB to SN, GF-5 in the Spring of 2010. So, IMO, these gallon jugs contain SN, GF-5 and were used to get rid of the inventory of "Obsolete Gallon Containers", since SOPUS, and other oil producers, were all converting to 5.1 quart and 5 quart jugs for private passenger automobiles.
 
Originally Posted By: Gokhan
Originally Posted By: cjohns79ut
Which oil cleans better?
From the VOAs, PYB cleans much better as it has 41% more Ca detergents than Castrol GTX and 17% more Mg detergents.
Hmm, you got these numbers from VOAs on this site? Please share as I tried searching a while ago and did not find much.
 
Originally Posted By: Brenden
Originally Posted By: Gokhan
One concern is that large amounts of seal swellers found in high-mileage oils could end up damaging your good seals. That's probably the biggest risk with HM oils. They tend to have slightly higher ZDDP and HTHS viscosity for better wear protection but then if you want to get that, you can also use an HDEO. Of course, higher HTHS viscosity also means lower fuel economy, as it's always a compromise there.
Where are you getting your facts at that suggest the swell agents in a HM oil damage "good seals" And the MPG loss because of the HTHS is marginal at best, you will not see more than a 2% mpg + or - if you are using the proper grade, which is maybe 1 or 2, you have a larger margin of error when calculating your MPG than what the viscosity is going to change.
The GF-5 (resource conserving -- resource, among other things such as petroleum, meaning engine seals) and CJ-4 (current diesel category) categories both put maximum limits for seal swell as well as shrink. Too much swell or shrink is bad for your seals. Since the HM oils are neither GF-5 nor CJ-4, they aren't guaranteed to protect healthy seals as the GF-5 or CJ-4 oils. This doesn't mean that they will damage new seals but it means that you're taking a risk. That's all I said. Sure, the fuel-economy loss would only be a few percent, about 1 - 3%, corresponding to about $50 extra in gas money per year for the average driver. On top of that you pay extra for HM oil. Benefits over regular oil are probably minimal if any.
 
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