K&N HP-1008 Premium Oil Filter

The HP-1008 is a compact wide-fitment spin-on on the M20 x 1.5 thread, covering a broad catalog across Honda (including many Civic and Accord engines), Acura, Nissan, Infiniti, Mazda, Subaru, Mitsubishi, Suzuki, and Smart, among others. The vehicles listed above are the applications confirmed by two independent catalogs (WIX and FRAM); many more single-source applications exist and are held behind the fitment finder. Coverage varies by year and engine, so always verify your exact year, make, model, and engine against your owner's manual or the K&N fitment guide before buying.

The anti-drain-back valve (ADBV) is a one-way valve that prevents engine oil from draining back down into the oil pan when the engine is shut off. Without a functional ADBV, the oil film at the top of the engine can drain away during parking, leaving the upper engine dry at startup. The HP-1008 uses a silicone ADBV confirmed in K&N's own product cross-section imagery. A functional ADBV means oil pressure builds faster at cold start, reducing bearing wear during the highest-wear moment of engine operation.

K&N claims the HP-1008 traps up to 98% of contaminants at 30 microns. No test method of any kind has been cited alongside that figure, including no proprietary brand-internal standard. No independently verified SAE J1858 multi-pass test data has been located for the HP-1008. Under the CCT quality rubric, a specific efficiency number without a named test method scores the same as no data at all. The 98% / 30-micron figure on the product packaging is an unverified marketing claim, and that is reflected in the CCT quality score.

K&N markets the HP-1008 with a '20,000 Mile Engine Protection' claim, qualified on K&N's own packaging as dependent on following your vehicle manufacturer's recommended change intervals. No community cut-open data corroborating the HP-1008's structural integrity at 20,000 miles has been located. The manufacturer-stated service interval earns credit on the environment rubric's lifecycle dimension, but community corroboration of the 20,000-mile claim is absent.

The California Proposition 65 warning on K&N oil filters is standard for metal automotive parts that contain nickel, lead, or other Prop 65-listed heavy metals in trace quantities from the steel canister, end-caps, or base plate materials. This warning is common across the oil filter category as a whole and does not indicate a chemical exposure hazard from normal use of the filter.