Thanks to all who chimed in to assist me, I appreciate it very much. Kudos!
2012 Mustang GT w- Oil Jets; Heavier Viscosity OK?
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Originally Posted By: turnbowm
Based on 540Rat Engineering tests, oil film strength can be a critical factor in engine wear especially in extreme load conditions. Data was available for PUP in 5W30, but not for 5W20. However, data was available for the older PU (API SM) with an indicated oil film strength of 115,612 psi for 5W30 versus 86,034 psi for 5W20. Based on the superior oil film strength of the heavier 5W30, I think this might be a better choice in your particular case.
In 540Rat's spring 2015 update, he tested regular old QSUD 0/5w-20 SN as the HIGHEST rated ever regular store bought oils....higher than QSUD 5w-30. Who would have thought? Yup, ahead of flagship oils like Castrol Edge, PP, PU, M1, etc. So that kills the 30 vs. 20 grade debate for a while with respect to RAT's testing. And to muddy the waters even further....read on.
I just checked the latest 540RAT edition and QSUD 0w-20 moved down into 2nd place, beat out by Mobil 1 0w-40 FS which was just recently tested this past summer. This is quite interesting since for years this testing showed the 40 grades to be worse than 20 and 30 grades as a rule. The 2013-2015 versions of M1 0w-40 (pre GTL) tested out in the bottom half of all oils at #105. Very mediocre. And now the FS version that doesn't even meet the BMW LL-01 standards anymore is highest ranked ever? You gotta love the consistency in this testing...lol. Remember that these test results do not apply to wear occurring in an operating engine, but to a 1 arm bandit testing device. So now you have 20, 30 and 40 grade oils potentially testing high on the list.
540RAT
Based on 540Rat Engineering tests, oil film strength can be a critical factor in engine wear especially in extreme load conditions. Data was available for PUP in 5W30, but not for 5W20. However, data was available for the older PU (API SM) with an indicated oil film strength of 115,612 psi for 5W30 versus 86,034 psi for 5W20. Based on the superior oil film strength of the heavier 5W30, I think this might be a better choice in your particular case.
In 540Rat's spring 2015 update, he tested regular old QSUD 0/5w-20 SN as the HIGHEST rated ever regular store bought oils....higher than QSUD 5w-30. Who would have thought? Yup, ahead of flagship oils like Castrol Edge, PP, PU, M1, etc. So that kills the 30 vs. 20 grade debate for a while with respect to RAT's testing. And to muddy the waters even further....read on.
I just checked the latest 540RAT edition and QSUD 0w-20 moved down into 2nd place, beat out by Mobil 1 0w-40 FS which was just recently tested this past summer. This is quite interesting since for years this testing showed the 40 grades to be worse than 20 and 30 grades as a rule. The 2013-2015 versions of M1 0w-40 (pre GTL) tested out in the bottom half of all oils at #105. Very mediocre. And now the FS version that doesn't even meet the BMW LL-01 standards anymore is highest ranked ever? You gotta love the consistency in this testing...lol. Remember that these test results do not apply to wear occurring in an operating engine, but to a 1 arm bandit testing device. So now you have 20, 30 and 40 grade oils potentially testing high on the list.
540RAT
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Would tests like this be good for testing camshaft wear,especially flat tappet?
Originally Posted By: aquariuscsm
Would tests like this be good for testing camshaft wear,especially flat tappet?
It could be. If you read the 540RAT lead in material it may discuss that very situation. Read it a couple years ago and an not ready to wade through it all again....lol. Of course if it does, the high zinc levels needed on flat tappet cams don't seem to test well on RAT's apparatus. Some of the best results seem to come with moderate Zinc levels of 700-1000 ppm and not the 1200-1500 levels or higher you'd expect for flat tappet cams. As I recall, RAT's testing goes south when Zinc levels get much over 1600 ppm.
Would tests like this be good for testing camshaft wear,especially flat tappet?
It could be. If you read the 540RAT lead in material it may discuss that very situation. Read it a couple years ago and an not ready to wade through it all again....lol. Of course if it does, the high zinc levels needed on flat tappet cams don't seem to test well on RAT's apparatus. Some of the best results seem to come with moderate Zinc levels of 700-1000 ppm and not the 1200-1500 levels or higher you'd expect for flat tappet cams. As I recall, RAT's testing goes south when Zinc levels get much over 1600 ppm.
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IMO, BrocL wrote a good summary on the Rat thread (wrt mechanical lifters/cams) ...
Buy a GM muscle car and stop worrying about the pickiness of the so called "vehicles" that have a blue oval in the grill
Originally Posted By: A_Harman
Does the supercharger use engine oil in the timing case, or does it have its own oil?
If it is a Whipple screw type blower it should have it's own oil with a sight glass. They are essentially lifetime fills with like 100k OCIs.
Does the supercharger use engine oil in the timing case, or does it have its own oil?
If it is a Whipple screw type blower it should have it's own oil with a sight glass. They are essentially lifetime fills with like 100k OCIs.
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Originally Posted By: turnbowm
Originally Posted By: OilQuestions
...I'm going to run Pennzoil Ultra Platinum 5W-20 with a WIX XP oil filter for the first two oil changes, and get my transmission oil and rear diff oil changed too. Car has 27k miles now.
Based on 540Rat Engineering tests, oil film strength can be a critical factor in engine wear especially in extreme load conditions. Data was available for PUP in 5W30, but not for 5W20. However, data was available for the older PU (API SM) with an indicated oil film strength of 115,612 psi for 5W30 versus 86,034 psi for 5W20. Based on the superior oil film strength of the heavier 5W30, I think this might be a better choice in your particular case.
540Rat
That 540Rat "oil testing" is one of the biggest jokes on the interweb.
Originally Posted By: OilQuestions
...I'm going to run Pennzoil Ultra Platinum 5W-20 with a WIX XP oil filter for the first two oil changes, and get my transmission oil and rear diff oil changed too. Car has 27k miles now.
Based on 540Rat Engineering tests, oil film strength can be a critical factor in engine wear especially in extreme load conditions. Data was available for PUP in 5W30, but not for 5W20. However, data was available for the older PU (API SM) with an indicated oil film strength of 115,612 psi for 5W30 versus 86,034 psi for 5W20. Based on the superior oil film strength of the heavier 5W30, I think this might be a better choice in your particular case.
540Rat
That 540Rat "oil testing" is one of the biggest jokes on the interweb.
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