What is the difference between a full flow and a bypass oil filter?
Full flow is where 100% of the oil passing through the same media before entering the engine. Bypass filters are more restrictive and take a portion of the oil and filter out smaller particles that can or have passed through the full flow filter. Common in heavy duty applications. Some filters can be a combination of full flow and bypass in a single canister, eg Ryco Z334 in Landcruisers.