Can someone please clear this up for me! Which one is better? A PAO oil or an Ester based oil?
I thought ester had a higher viscosity index that PAO.quote:
.........................PAO....ESTER
VI.......................good...medium
Hydrolitic stability.....good...bad
low/high vis grades......good...medium
Bruce381 is providing us with insights based on his many years as a professional working with lubricant/oil formulations.quote:
.........................PAO....ESTER
Additive solubility......bad....good
VI.......................good...medium
Hydrolitic stability.....good...bad
low/high vis grades......good...medium
cost.....................low....high
quote:
Originally posted by Blue99:
Bruce381 is providing us with insights based on his many years as a professional working with lubricant/oil formulations.
The percentage of POE RL uses is unknown, but speculated to be 65% or greater. Cost is the main issue why most don't more POE in their oils.quote:
However the RL lubes don't provide the cold temp performance, (or extended drain capability) of a very high TBN, PAO based lube like Amsoil or the GC/0w-30 or Mobil 1....
I don't know. 10-18,000 mile OCI's seem pretty darn "extended drain", wouldn't you say. I don't see anyone even attempting these OCI's w/ GC or especially M1 0W-30.quote:
Originally posted by TooSlick:
The blended PAO/Ester basestocks have the best overall physical/chemical properties - and the take well to additive packages that are developed for conventional lubricants.
Note that the "Group III" synthetics simply replace the PAO portion of the basestock blend with the less expensive Group III, hydroisomerized oil. So these are more accurately called Group III/Ester blended base stocks.
Pure ester based synthetics more most useful to make synthetic two stroke lubricants, since the esters burn and exhaust even more cleanly than PAO's and the esters provide lubricity in the gas/oil mixtures....
Before the Redline guys have a cow, I should mention their excellent product.It would be accurate to think of RL as a Polyol-ester/PAO product; containing > 50% PE (RL is very coy as to how much PE is in the basestock blend). The strong point of RL is high temp performance - particularly in a true racing application. However the RL lubes don't provide the cold temp performance, (or extended drain capability) of a very high TBN, PAO based lube like Amsoil or the GC/0w-30 or Mobil 1....
Tooslick
Ahh, I believe this would be a Redline guy having a cow!quote:
I don't know. 10-18,000 mile OCI's seem pretty darn "extended drain", wouldn't you say. I don't see anyone even attempting these OCI's w/ GC or especially M1 0W-30.
quote:
Originally posted by boxcartommie22:
dave at red line the tbn of their oils is 7
quote:
Originally posted by Blue99:
[QB]Bruce381 is providing us with insights based on his many years as a professional working with lubricant/oil formulations..........................PAO....ESTER
Additive solubility......bad....good
VI.......................good...medium
Hydrolitic stability.....good...bad
low/high vis grades......good...medium
cost.....................low....high
I think he is trying to provide a "25 words or less" answer to a complicated question.
BLUE99......YOU are right Thank You I tried to make a short comparison on a lengthy subject.
Unlike PAO's which are defined pretty well esters can be made from a lot of STUFF and the characteristics are all over the place.
VI on esters is from low to high.
Hydrolitic stability varies as to type and raw materials used in the ester, some have great resistance to water.
Bruce
Blending PAOs with ester is supposed to help with multiviscosity characteristics.quote:
Originally posted by TooSlick:
The blended PAO/Ester basestocks have the best overall physical/chemical properties - and the take well to additive packages that are developed for conventional lubricants.
--snip--
Pure ester based synthetics more most useful to make synthetic two stroke lubricants, since the esters burn and exhaust even more cleanly than PAO's and the esters provide lubricity in the gas/oil mixtures....