Hib Halverson
Technical Writer for Internet & Print Media
I ran out of oil filters this week and, since it had been a number of years since I bought any, I did a little research.
The market has changed drastically since the last time I did this.
Seems there are few good options for LT5 oil filters these days.
The good old ACDelco PF930C?
No longer made by GM. Now made by Champion Labs, which makes filters for many vendors. GM choose to use Champion's low-line filter design, called "Ecore" by Champion Labs. Looking at some oil filter test data I found at Russ Kinze's famed oil filter site, it's obvious to me that any of Champion's "Ecore" filters are junk. Exec. Summary: don't by ACD filters for LT5s
The Bosch oil filter used to be one of Champion Labs' really good filters, known as the "Performance" line, but it's performance is now degraded due to a change in suppliers. Previously, I recommended and used the Bosch, but no more.
The Mobil 1 and the K&N oil fitlers are still made by Champion Labs and still use that company's high performance design. Currently I use the Mobil 1 #207. I get 'em in 2-packs from Amazon.com.
Those are the only two filters I'd consider having performance which compliment the LT5 engine's performance and the 2G ZR-1 community's need for the utmost in oil filtering.
What if you either can't get the M1 or the K&N or are too cheap to pay the 12 to 15 bucks each they cost?
A few filters are acceptable (ie: one of these is better than not changing your filter) for use on an LT5 are; Wix (also makes CarQuests filters), Purolater, Baldwin/Hastings, Bosch (now made by Purolator)
Most of the others are junk including the aforementioned ACDelco, Fram, Quaker State, STP, and many private label filters you find at a mass marketer....AutoZone, Walmart, O'Riley, Pep Boys, etc.
The market has changed drastically since the last time I did this.
Seems there are few good options for LT5 oil filters these days.
The good old ACDelco PF930C?
No longer made by GM. Now made by Champion Labs, which makes filters for many vendors. GM choose to use Champion's low-line filter design, called "Ecore" by Champion Labs. Looking at some oil filter test data I found at Russ Kinze's famed oil filter site, it's obvious to me that any of Champion's "Ecore" filters are junk. Exec. Summary: don't by ACD filters for LT5s

The Bosch oil filter used to be one of Champion Labs' really good filters, known as the "Performance" line, but it's performance is now degraded due to a change in suppliers. Previously, I recommended and used the Bosch, but no more.
The Mobil 1 and the K&N oil fitlers are still made by Champion Labs and still use that company's high performance design. Currently I use the Mobil 1 #207. I get 'em in 2-packs from Amazon.com.

Those are the only two filters I'd consider having performance which compliment the LT5 engine's performance and the 2G ZR-1 community's need for the utmost in oil filtering.
What if you either can't get the M1 or the K&N or are too cheap to pay the 12 to 15 bucks each they cost?
A few filters are acceptable (ie: one of these is better than not changing your filter) for use on an LT5 are; Wix (also makes CarQuests filters), Purolater, Baldwin/Hastings, Bosch (now made by Purolator)
Most of the others are junk including the aforementioned ACDelco, Fram, Quaker State, STP, and many private label filters you find at a mass marketer....AutoZone, Walmart, O'Riley, Pep Boys, etc.