About EFSF-40 Pack

Each Bilstein EFSF-40 40-Pack consists of the following:

1. Two six gallon containers of Bilstein engine flush solution. Each container marked with batch code.

2. Forty 3-micron canister filters.

3. One 3-micron spin-on filter.

Each container marked with batch code and date of manufacture.

The EFSF-40 pack provides enough solution and filters for 40 engine flush services.

 

 

 

Filter Replacement

The 9 3/4" three (3) micron exterior filter is replaced after every flush. This can be used as a diagnostic yardstick as to the condition of the engine. 
1. The three (3) micron internal metal spin-on filter is replaced every 40 flushes.
2. Exterior - Every Flush
3. Internal - 40 Flushes*
4. Solution - 40 Flushes*
Each container marked with batch code and date of manufacture.

The EFSF-40 pack provides enough solution and filters for 40 engine flush services.