Using a H6 oil filter on an H4 engine.
Note: I have been reading some things that suggest the fact that Subaru intentionally made the filters smaller to avoid heat from the exhaust manifold. I can not confirm this myself, but it is very possible. My 2010 Impreza non turbo sure had exhaust that was tightly wound around the filter.
So.. I have always been a fan of using the biggest oil filter possible. This time when I was at the store to buy an oil filter, I started looking at what other options I had. I have always used the Bosch D3300 as called for, but there is also a D3312 for the H6 engine. The threads are the same, the diamater of the filter and gasket are slightly larger. Looking into the filter, there is a lot more filter surface area, as well as what looks to be much better flow. The only deal breaker is the bypass valve pressure. After doing some research I found that the specified bypass psi range for both filters overlap each other, so this D3312 should be safe to use. Here are some pictures of the differences.
Goodbye old friend!
The 1999 Civic has been sold. After nearly 15 years, its by far had the longest stay in my garage than any other vehicle. My intentions were to rebuild the engine and have it back on the road, but life got in the way. Rather than leave it sit there and rot up, I decided to sell it. One of my co-workers sons purchased it and is now building a monster.
We have two gone and one new addition to the fleet.
The 1972 Cadillac has been sold.. so has the wifes 2010 Subaru Impreza in favor of a larger KIA Sorento. She wanted something with a third row seat.
This is my first KIA.. in fact I had never even been in one before. Initial impressions are good, but only time will tell how well it holds up.