What is the difference between these two filters?
ASF vs SDF
- Thread starter Rat407
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Just earlier nomenclature. ASF must be 5+ years old. I cannot say they are a different Hastings/Baldwin filter than an SDF.
They changed the blend of materials used for the filter media, and went from a piece of spring steel to a coil spring to retain the media and end caps inside the filter canister. The SDF filters also incorporate a new type of elastomeric ADBV - that change was fairly recent and happened about a year ago.
The design of the internal bypass valve has also changed fairly recently. I think that was a change that Baldwin made on a number of their own filters as well.
Amsoil changed their filter design soon after the Mobil 1 oil filter hit the market in the late 1990's. The old ASF filters were not as good as the M1's, and Amsoil didn't find that acceptable.
Tooslick
Dixie Synthetics
[ November 16, 2003, 08:21 AM: Message edited by: TooSlick ]
The design of the internal bypass valve has also changed fairly recently. I think that was a change that Baldwin made on a number of their own filters as well.
Amsoil changed their filter design soon after the Mobil 1 oil filter hit the market in the late 1990's. The old ASF filters were not as good as the M1's, and Amsoil didn't find that acceptable.
Tooslick
Dixie Synthetics
[ November 16, 2003, 08:21 AM: Message edited by: TooSlick ]
TS - just for clarification, the newer ADBV and the upfront coil BV (Ford style) have zero to do with the name change (but of course the ancient ASF didn't have these)
I still have a few of the old ASF models.
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