Earlier this year I received a UOA from Oilguard that had a suspicious lack of wear metal, even for the short intervals I ran (2,750 miles). Several others chimed in that they too had received suspiciously clean UOAs from Oilguard.
I decided to run to about 4,000 miles and send samples to both Oilguard and Blackstone for comparison puposes.
Oil is SL Maxlife group III that I got for $2 at Autozone. Engine is the 4.5 liter inline 6 - no mods on the engine. Running Purolator paper filter (about 5,000 miles on it at the start) and Napa Gold 1515 oil filter.
1 quart make-up (leaks a little at the rear main seal and pan arch). Seems to eat a little bit, too!
Miles are about 50% highway, 50% Houston commute. Includes two trips to the hunting lease where it was really dry and dusty. More idling than usual in the dusty conditions as we did some late night work in the headlights (it was 104 F during the day so we were trying to work when it was cooler!).
First column is BITOG VOA #, second is Blackstone, third is Oilguard. Not all tests done by both labs...if the format goes haywire, maybe a mod will help me out!
Blackstone seems to show high additives of CA, P, Moly and ZN relative to the VOA. Oilguard seemed to have a much more believable Moly number.
Boths labs showed significantly less AL than the VOA. Oilguard was higher than Blackstone on CU and K, lower on FE and PB.
I have the feeling that the metals are low enough in the samples that I am now wishing I had waited until 5 or 6,000 miles to send them in. This engine does not seem to throw much metal around!
In the five samples tested from this engine to date, the Blackstone is the only one in double-digits on SI. The other four ranged from 5 to 9. Generally, the filtration systems on Cruisers are very good so long as the tube running from the air box to the throttle body has not been abused and cracked. Mine is fine. The Blackstone sample was the very first ever taken from the new Fumoto. I even wondered if the Fumoto may have contributed a ppm or two CU as previous samples have not shown 3-4ppm CU, but 1.
Comments welcome.
Tim
[ October 11, 2005, 10:14 AM: Message edited by: 59 Vetteman ]
I decided to run to about 4,000 miles and send samples to both Oilguard and Blackstone for comparison puposes.
Oil is SL Maxlife group III that I got for $2 at Autozone. Engine is the 4.5 liter inline 6 - no mods on the engine. Running Purolator paper filter (about 5,000 miles on it at the start) and Napa Gold 1515 oil filter.
1 quart make-up (leaks a little at the rear main seal and pan arch). Seems to eat a little bit, too!
Miles are about 50% highway, 50% Houston commute. Includes two trips to the hunting lease where it was really dry and dusty. More idling than usual in the dusty conditions as we did some late night work in the headlights (it was 104 F during the day so we were trying to work when it was cooler!).
First column is BITOG VOA #, second is Blackstone, third is Oilguard. Not all tests done by both labs...if the format goes haywire, maybe a mod will help me out!
Fuel, antifreeze, water all zero
Blackstone seems to show high additives of CA, P, Moly and ZN relative to the VOA. Oilguard seemed to have a much more believable Moly number.
Boths labs showed significantly less AL than the VOA. Oilguard was higher than Blackstone on CU and K, lower on FE and PB.
I have the feeling that the metals are low enough in the samples that I am now wishing I had waited until 5 or 6,000 miles to send them in. This engine does not seem to throw much metal around!
In the five samples tested from this engine to date, the Blackstone is the only one in double-digits on SI. The other four ranged from 5 to 9. Generally, the filtration systems on Cruisers are very good so long as the tube running from the air box to the throttle body has not been abused and cracked. Mine is fine. The Blackstone sample was the very first ever taken from the new Fumoto. I even wondered if the Fumoto may have contributed a ppm or two CU as previous samples have not shown 3-4ppm CU, but 1.
Comments welcome.
Tim
[ October 11, 2005, 10:14 AM: Message edited by: 59 Vetteman ]
