Originally Posted By: Gokhan
Originally Posted By: Nyogtha
Originally Posted By: Gokhan
The reason I asked was because someone claimed the older version had higher efficiency. I don't know if this is true.
Someone posted documentation with a link showing previous higher efficiency.
https://drive.google.com/file/d/0Bz2NTEAdC4vxdDNXV05Yc0FHUGczaVRTeF9qb0FuTWt2bXRF/view
But I guess except for Motorking nobody knows if this is true?
BITOG thread link
Thanks, this is useful info. It's hard to say whether the old version that had 99.6% efficiency @ 25 microns is any different than the new version that has 99+% efficiency @ 30 microns.
It's also interesting that Fram Extraguard has higher efficiency than Mobil 1, and Purolator has the same efficiency as Mobil 1.
Why do you find it difficult to tell if the media changed? Is your position the same media is being used and it has an essentially flat efficiency curve between 25 and 30 microns?
If so then why enlarge the micron rating point number? Isn't that a change directionally opposite desireable marketing?
Also did you see the posts in the linked thread where someone called Champion Laboratories and was told the changes were at the request of XOM?
Also, Purolator efficiency has changed since that document from Champion Labs was generated. I believe the Fram Extraguard has also changed since then.