4 SALE: MOBIL 1 & PF970 OIL FILTERS - ZR-1 Net Registry Forums

91vettezr1 · 10-17-2020

mobil 1 filters all sold.
AC DELCO PF970 oil filter nos. Selling set of 4 filters for $50 shipped .Really don't want to sell individually .
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From Marc Haibec website.

Anti-Drainback Test Results
The filters were removed from LT5 engines 8 hours after shutdown. The oil to weight
ratio is the weight of the retained oil expressed as a percentage of the total weight of the
filter and the oil. The testing was performed with Mobil 1 10W-30 oil. Mobil1 10W-30
oil weighs .94 ounce in mass per fluid ounce of volume.
Filter. Weight when new. Weight after 8 hours. Retained oil weight. Oil to weight ratio.
PF970 14oz. 25oz. 11oz. 44%
PF970C early 15oz. 18oz. 3oz. 17%
PF970C late 15oz. 20oz. 5oz. 25%
PF970C blue 14oz. 22oz. 8oz. 36%
Bosch 3401 13oz. 22oz. 9oz. 41%
Mobil 1 207 17oz. 21oz. 4oz. 19%
Recommendations
The old blue PF970 was the best performer in this test. However, it is no longer available
from AC-Delco. The Bosch 3401 and the blue PF970C filters are about equal with very
good anti-drainback performance in this test.

10-17-2020	#1
91vettezr1 Join Date: May 2004 Posts: 451	4 SALE: MOBIL 1 & PF970 OIL FILTERS mobil 1 filters all sold. AC DELCO PF970 oil filter nos. Selling set of 4 filters for $50 shipped .Really don't want to sell individually . [/SIZE][/B][/COLOR] From Marc Haibec website. Anti-Drainback Test Results The filters were removed from LT5 engines 8 hours after shutdown. The oil to weight ratio is the weight of the retained oil expressed as a percentage of the total weight of the filter and the oil. The testing was performed with Mobil 1 10W-30 oil. Mobil1 10W-30 oil weighs .94 ounce in mass per fluid ounce of volume. Filter. Weight when new. Weight after 8 hours. Retained oil weight. Oil to weight ratio. PF970 14oz. 25oz. 11oz. 44% PF970C early 15oz. 18oz. 3oz. 17% PF970C late 15oz. 20oz. 5oz. 25% PF970C blue 14oz. 22oz. 8oz. 36% Bosch 3401 13oz. 22oz. 9oz. 41% Mobil 1 207 17oz. 21oz. 4oz. 19% Recommendations The old blue PF970 was the best performer in this test. However, it is no longer available from AC-Delco. The Bosch 3401 and the blue PF970C filters are about equal with very good anti-drainback performance in this test. Last edited by 91vettezr1; 12-01-2020 at 10:02 AM.