Recent content by twX

Iron is nearly 5 times the universal average. Cr and Al are a bit high as well. With the high silicon, you probably have some dirt getting into the intake.

How does the oil change history correspond to the UOAs? One oil change at the time of each of the UOAs? The middle sample has the exact same ratio of elevated wear metals as the current UOA. What could it be contaminated with that could cause that?

Purolator's recommendation for the Outback is the PL14615. If your goal is low restriction, you don't want to use it. It's a very small filter and only has around half the filter media of an OEM filter. It also has the smallest inlet holes of any oil filter out there. I measured the...

Looks really good aside from the potassium. Not sure why a coolant leak would cause restricted EGR flow, or vice versa. Hopefully it isn't a leak somewhere else, or it it is, hopefully it's the oil cooler and not the head gasket or the upper oil pan. If there is a coolant leak, it doesn't see...

I get an area of 94.5 square inches from your formula.

Post the info here and I'll add them to the database. I have been slowly updating the spreadsheet. I'll try post the updated tables within the next few weeks. I've also several other filter sizes with different threads. I have a lot of data for FRAM 3675, 10575, 4967, 3600 -equivalent...

What year is the car? No engines that are sold in Europe have had lead bearings since ~2012. It's probably the race gas.

They do use synthetic blend media. WCW has cut open a few unused Tokyo Rokis on his channel. Under the microscope, the media porosity seems to range from pretty average, to pretty high, depending on the filter. They certainly don't have high efficiency. Construction quality is excellent though.

If the intake valves are heavily gunked up, you could expect a reduction in airflow at wide open throttle, but it will probably have little to no effect on fuel trims. What you'll need to monitor are mass airflow, absolute pressure at the intake manifold, and intake manifold temperature (or...

Even if you're a shorter rider, I'd still get an adult/adolescent sized bike instead of a kid's bike. You'd be surprised how easy it is to ride a 125 to 200cc adult-sized trail bike compared to even the smallest street bikes like the CBR250R, even if the seat height is a few inches higher and...

The IIIH test uses a 3.6L Pentastar engine run at a constant 3900 rpm, 137 hp, and 184 lb-ft of torque (~70% of peak torque). It's pretty much equivalent to driving at very high speed, except that the oil temperature is maintained at 150°C, which is a lot hotter than it would typically get in...

The blue stuff is also on sale.

I don't think cleaner pistons will always reduce oil consumption. Piston ring and cylinder liner wear will increase the piston ring clearances, which will start to increase oil consumption once they're worn beyond a certain point. Piston deposits in the ring grooves, behind the rings, will...

Are you sure that model of Amsoil filter is the one recommended for your engine? This lists the EAO34 and EAO35 as equivalents to the FL400S.

The Amsoil filter seems a lot smaller than an OEM filter or a Fram 3600. It looks like a Fram 4967 equivalent (2.7" x 3.0"). I'd use something bigger. Here's a list of some 4967-sized filters with media area measurements. Amsoil filters are typically the same as the Fram Endurance, and that...