CJ3Flyr
Super Moderator
I have decided to do some oil filter research. My goal was to come up with some larger filter options that would allow for a slight increased oil capacity AND take advantage of the 1GRFE’s filter position (right behind the fan stream). A larger exterior surface would, IMHO allow for slightly more heat transfer. I think the benefit of a larger filter on our application would be cooler oil, more filtration media (long-interval, synthetic guys will like that) and slightly more oil capacity.
The quick, knee-jerk reaction would be to spin-on a PL30001, PH8A, Toyota 15600-41010 or 90915-TD004 (big LC filter), Napa 1515 or similar. If you didn’t want to go that big maybe a PH3600 or PL20195… Easy enough and done, right? Well not so fast. A few quick reads (primarily at the FJC forums, those guys are so adventurous) revealed that due to our super-sweet oil filter location the filters seem to drain out. They seem to drain out overnight or longer and there was talk delays with the oil pressure rising and some noise. Based on other engine experience I don’t doubt that is a real possibility/likelihood. Next, the focus would then seem to be quality of the anti-drainback valve. I don’t doubt that the anti-drainback valve is important but I wasn’t willing to leave it there… On a long sit some oil can drainback through the center (return-side), IMHO and that's where the 'big' filters fail; less than perfect anti-drainback valves and some return through the center. IMHO the smaller volume of the stock sized filter means that if it does drain it refills quickly.
The quick, knee-jerk reaction would be to spin-on a PL30001, PH8A, Toyota 15600-41010 or 90915-TD004 (big LC filter), Napa 1515 or similar. If you didn’t want to go that big maybe a PH3600 or PL20195… Easy enough and done, right? Well not so fast. A few quick reads (primarily at the FJC forums, those guys are so adventurous) revealed that due to our super-sweet oil filter location the filters seem to drain out. They seem to drain out overnight or longer and there was talk delays with the oil pressure rising and some noise. Based on other engine experience I don’t doubt that is a real possibility/likelihood. Next, the focus would then seem to be quality of the anti-drainback valve. I don’t doubt that the anti-drainback valve is important but I wasn’t willing to leave it there… On a long sit some oil can drainback through the center (return-side), IMHO and that's where the 'big' filters fail; less than perfect anti-drainback valves and some return through the center. IMHO the smaller volume of the stock sized filter means that if it does drain it refills quickly.
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