Please educate this noobie on the differences of base stock numbers. I hear about group II and III and such, but have no clue as to what is what.
Experts? What you typed was pretty impressive!quote:
Originally posted by sbc350gearhead:
I am sure that the experts around here can give you a much better definition of the base stocks.
quote:
Originally posted by sbc350gearhead:
GII- hydrotreated petroleum base stock. More refined, with less gunk in it. -*-*
GIII- "hydrocracked" or severely hydrofinished base stock. Castrol won the right for oil blenders to call this group "synthetic". -*-*
I think as it stands right now, Group 5 is actually a "catch all" category for any type of full synthetic base oil which isn't PAO, so it's not just limited to esters only, but esters and any other special synthetic base oils (can't think of their names offhand)quote:
Originally posted by sbc350gearhead:
G-IV PAO base stock. Chemically produced from ethelene gas. True synthetic oil, and primary basestock used in mobil, amsoil and most top tier synthetics. Much more stable and has higher VI index than GIII. Can handle more extreme temps.
G-V ester base stock. used in most synthetic oils for miscibility, and is primary base used in redline and a few others. Extreme natural detergency and cleaning ability. Strong attraction to metal. Can withstand more extreme temps than PAO.
I am sure that the experts around here can give you a much better definition of the base stocks.
Thanks! I'm glad I wasn't imagining things.quote:
Originally posted by Titanium_Alloy:
Here is the post by Patman on group VI base.
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=4;t=000219
Regards,
Great outline.quote:
Originally posted by sbc350gearhead:
GI- solvent refined petroleum base stock. It is common belief that no SL rated oil uses 100% GI basestock, but some of them do have some GI in them.
GII- hydrotreated petroleum base stock. More refined, with less gunk in it. More stable, and usually with a higher viscosity index. Chevron and pennzoil oils use nothing but this group in their oils. Common belief that all SL oils use this in a certain amount.
GIII- "hydrocracked" or severely hydrofinished base stock. Castrol won the right for oil blenders to call this group "synthetic". Most OTC synthetics are made from this base. I think they use the same process to make it as GII, but take it a step further.
G-IV PAO base stock. Chemically produced from ethelene gas. True synthetic oil, and primary basestock used in mobil, amsoil and most top tier synthetics. Much more stable and has higher VI index than GIII. Can handle more extreme temps.
G-V ester base stock. used in most synthetic oils for miscibility, and is primary base used in redline and a few others. Extreme natural detergency and cleaning ability. Strong attraction to metal. Can withstand more extreme temps than PAO.
I am sure that the experts around here can give you a much better definition of the base stocks.
and could include some group IIquote:
Originally posted by RobWest:
and synthetics can be anywhere from Group III to Group V?
I hope the prize is a new Corvette! (or even a used one would be nice, as long as it's a 97 or newer)quote:
Originally posted by hmeyer:
Patman wins the prize. 10,000 posts!
Too late bro, I already have the bug! And I've already been converted to a Chevron/Havoline guy after only 4 days! I wasn't really getting hung up on base stocks, just curious as to what they actually meant and which types of oils were made from each type.quote:
Originally posted by mikemc:
Rob, I think you'd better put on some insect repellant, you are about to get bitten by the oil bug!This is a great site and you can learn some neat stuff by reading old posts and going into the various info categories. If you want to use a conventional oil with a great base stock, 3 of the better ones are Pennzoil, Motorcraft and Chevron Supreme (or Havoline if it says 'Chevron' on the back label). There are others, you just have to do some research.
But these are not set in stone.quote:
Originally posted by Ray H:
Group II+ base stocks have a viscosity index range of 110-119. Group III starts at 120. -*-*-*