i think i heard that all 5w20 oils would have to be semi-synthetic to get the sm grade? its that right or are there some 5w20 conventionals
are all 5w20 oils semi-synthetic?
- Thread starter aztec12
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If it's a group III blend, and this is Mobil...
I would not get to hung up on semi synthetics. Semi synthetic & synthetic blend wording does not mean much, more or less marketing.
Semi synthetics ARE conventional oils with a small percent of synthetic. A blender can throw in 10% synthetic and call it a semi synthetic or a synthetic blend. Better to pick an oil on its reputation and UOA accomplishments... not on the fancy marketing wording.
Semi synthetics ARE conventional oils with a small percent of synthetic. A blender can throw in 10% synthetic and call it a semi synthetic or a synthetic blend. Better to pick an oil on its reputation and UOA accomplishments... not on the fancy marketing wording.
I think ALL 5/20 Must now be at least all GPII with or without some GPIII to meet the 15% NOACK volitilty requirment. NO GPI at all or not much anyway so it depends on how you define a syn.
bruce
bruce
i'm quite sure there is 5w20 conventional
Castrol GTX comes in a 5W-20, and says nothing about synthetic on the bottle.
Castrol GTX comes in a 5W-20, and says nothing about synthetic on the bottle.
""i'm quite sure there is 5w20 conventional""
As I said GPI base oil I call conventional will not run in a 5/20.
GPII and GPIII which some call syn WILL work.
bruce
As I said GPI base oil I call conventional will not run in a 5/20.
GPII and GPIII which some call syn WILL work.
bruce
Probably why with GF4 requirements and what not Conoco Philiips dropped 5W-20 and 5w30 from conventional ranks. They still have 10w30 and 10W-40 though as conventional only blends on the lower stuff.
since when is Group 2 considered a synth?
5-20s are very well built, by whatever means.
They had to pass tests twice as stringent as other oils, to meet Ford's recommendations.
Now, oils are tested in a similar manner - tougher for other oils, and less tough for the 20s.
But it's all good.
20s have some sort of high refining going on. There are no cruddy name brand 20s.
They had to pass tests twice as stringent as other oils, to meet Ford's recommendations.
Now, oils are tested in a similar manner - tougher for other oils, and less tough for the 20s.
But it's all good.
20s have some sort of high refining going on. There are no cruddy name brand 20s.
The difference in price is QUITE a stretch. If the additives perform better b/c the base oil is gIII, then it's worth the difference.
No there are 5w20's that are conventinal oil based. Some may question the need to use a syntetic oil to get such a narrow viscosity range.
""No there are 5w20's that are conventinal oil based""
If you mean GPI oil NO there is not name one?
bruce
If you mean GPI oil NO there is not name one?
bruce
Conventional (non synthetic) includes Group I & II. In respect for the sponsors Castrol GTX is one of them.
http://www.castrol.com/liveassets/b...canada/STAGING/local_assets/downloads/a/a.pdf
OK that is GF-3 volitility is/was think 18% or so a GPI at perhaps 40-50% MAY make that do not know for sure BUT a GF-4/SM is max 15% and a GPI if used would be at low levels with a majority of GPII or GPIII.
bruce
bruce
Or, why is Group III a "semi-synth" when Group II+ isn't?
I don't think many, if not most, 5W-20s would be "synthetics," but are most blended with, or are entirely comprised of, base oils that meet the GrII+ specs?
Sorry, I think Castrol's specs are out of date. I tried to support a sponsor... Conventional Pennzoil "yellow bottle" is another example, and is SM GF-4. NOACK 13%.
http://www.pzlqs.com/Tech/Pdsheet/DomesticMarketing/EngineOils/pdf/Multigrade.PDF
http://www.pzlqs.com/Tech/Pdsheet/DomesticMarketing/EngineOils/pdf/Multigrade.PDF
Pennzoil says nowhere what base oil it is.
Look GPI is way to volitle at any percent over say 10% to use in a current PCMO 5/20.
I'm not even counting the problems meeting oxidation numbers with a GPI also.
All 5/20 are GPII or better if you call a GPII dino then you are right.
My 5/20 is all GPII.
bruce
Look GPI is way to volitle at any percent over say 10% to use in a current PCMO 5/20.
I'm not even counting the problems meeting oxidation numbers with a GPI also.
All 5/20 are GPII or better if you call a GPII dino then you are right.
My 5/20 is all GPII.
bruce
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