A bigger oil filter that fits gen 2

The oil filter test site is at Oil Filters Revealed - MiniMopar Resources.
The site owner has been threatened by lawyers representing a filter manufacturer, so it must be good info.

Uart, I would -NEVER- use a filter over more than one oil change. Glad you get away with it. I've never seen oil fail because it was used over a two change interval, but I have seen filters fail. It's not pretty!

As I said above, filters are cheap, engines are expensive. Change your filter!

 

No, I said that I don't do it because I'm doing 9k mile OCI's. What I said is that if I was doing 5k mile or less OCI's then I'd have no qualms in doing it.

Fair enough, but my question is how does the probability of failure vary with age. I mean if a filter is left in place (undisturbed) at 5k miles and the oil replaced, is a catastrophic failure more like or less likely. Perhaps it's less likely, many devices have failure probabilities that (up to a point) decrease with age. I'm just trying to differentiate between catastrophic failure and filtration failure due to particle loading of the media here.

 

That isn't a test report, it's a dissect, do some simple dimensional measurements and eyeball evaluation of quality with no performance or capacity testing. It's interesting and gives some insight into filter construction, but nothing about performance. If the 1500 miles claim was there (that would be hard to make with no actual testing), I missed it. Please point it out.

Please share the source of the above statement and point to the spot instead of linking to a long article. It sounds far off mark, or did you mean 15,000 miles?

The majority of automotive engines don't have a bypass circuit around the filter, that's why a bypass is built into most automotive filters.

 

A full flow filter doesn't remove the color from dark oil.

 

No, the filter study was drastically shortened. Perhaps that was in response to the legal threat. Too bad as there was good information in it.

I just checked the shop manual for the Prius and other vehicles and I think you are confused. There is an "anti-drainback valve" in some oil filters but no bypass valve. That is always in the engine. And there is always one there. It's what regulates the oil pressure. To make it otherwise would be inviting disaster. For example, in the Prius it's in the engine oil pump assembly (front valve chain cover).

 

The oil pressure regulator valve and oil bypass valve are two different valves. The regulator dumps excess oil pressure back to the sump the bypass valve bypasses the filter if the pressure difference across the filter (blocked filter) becomes to great, because unfiltered oil going round the engine is better than no oil. the pressure regulator valve is the one by or in the pump the bypass valve is usually in the filter as is the third valve the anti drain back.

 

Thanks for clarifying that Britprius.

BTW. I think I've read here that Toyota in Britain and Ireland recommends an OCI of 10k miles (or is it 15000km). On the one EOM filter, is that correct?

 

I'm not confused, and I read versions of that report back in the olden daze before it was shortened. The primary redactions were of the authors opinions, not data.

That report never was more than observations of dissected filters with some dimensions and opinions. As far as it went it was good, but it didn't get into actual filter performance.

 

Yes the OCI and filter is and has always been 10k miles for the gen2 Prius and at that mileage comes out very clean, at leased it does on my 2008 Tspirit at 80k running Mobil 1 0w/20 oil.

 

What oil do Toyota officially recommend there for the 10k OCI? Do they recommend a specific oil or do they recommend an ACEA spec like A3/B4 for example?

 

Recommended oil grades are from hand book: 20w50. 15w/40. 10w/30. 5w/30 API grade SL energy conserving. SM energy conserving, or ILSAC multigrade engine oil. This is for GEN2. The TGMO application chart also lists 0w20 oil.

 

Ok that sounds like the Australian application chart where they basically say use whatever grade you want. Toyota Australia recommends a 10000 km (6200 mile) OCI here, but I've been stretching that up to 15000 km in order to keep the interval to 6 monthly.

 

Our OCI is 10k miles or 1year whichever is first.

 

The finest full flow filter won't remove the color from oil. The color isn't from metal particles.

Some ultra fine bypass filters have claimed to make oil look clean, but production cars don't have bypass filters.

 

If I were more ambitious I might get interested in the Amsoil bypass system like discussed here http://priuschat.com/forums/gen-ii-prius-modifications/23222-bypass-filter-install.html. But there's just too many other things competing for time & attention these days.

- D