Charper732

Car has been boosted for ~3k miles. Oil pressure was perfect until the other day. Use to have 25psi at idle and 85psi wot now its at 11psi idle and 65-70 wot. This change just happend recently.
Motor has 110k on it. At this point im about to drop the pan and see what is going on. I had the pan off less than 1000 miles ago and there was zero bearing material. How common is it for oil pumps to go out?

jyeung528

not very common, let us know what you find out.

zeroptzero

It would be odd for oil pressure to drop quickly in 3k miles. Mine hovers around 15 psi fully hot and after running the car for a while, I'm only NA, and it has all new internal bearings and a brand new ap2 oil pump.

Oil pressure readings are very dependent on oil temperature, you should take the reading as soon as the engine hits 3 bars on the coolant temp gauge. Once oil temps increase beyond that point and after running hard you will see much lower pressure readings. With your engine being boosted you would have higher oil temps than the average S2000. The Honda spec for oil pressure is based on taking the reading as soon as the coolant gauge hits 3 bars. Try to take the readings consistently if you want to compare them. I don't think you need to drop the oil pan at this point, you could try to have the oil analyzed as a first measure and just dump the oil and replace with fresh. Your oil could have sheared in 3k miles depending on the type of oil you use, thinner oil = lower oil pressure.

What oil viscosity are you running ? Oil pump failures on these cars are rare, not likely the issue. I would dump the oil, have it analyzed and check the bearing wear elements, if you are running a 30 weight move up to a 40 weight and see how it works, then take your readings consistently if you want to compare them with any degree of accuracy (at 3 bars coolant temp ?).

Charper732

I am running on AEM infinity with all relevant sensors. Oil temp was below 170 with these readings. My oil temps have never gone above 210 as I have an oil cooler.
I am on rotella 5w-40. My oil gets changed very often as I am on E85

jyeung528

diesel oil has low SAPS which is good for your catalytic converter, but not so good for engine protection. may i ask why you choose to use diesel oil?

bgoetz

What year is the car?

s2000Junky

Doesn't make any sense. Diesels don't typically run cats for one thing and they are dirty running long mileage engines. This oil is geared towards that spectrum which on a clean running engine makes it that much better in my book. This oil was shown to have the highest levels of anti wear from Blackstone tests next to Amsoil posted here recently. Its excellent oil. Popular with boost guys especially. I run it at the road course when I know my oil temps get into the 250-260F range and want the added protection.

Charper732

I use to run amsoil, but I run T6 now because of the cost and with how frequently I have to change my oil because of running E85. The only thing current high dollar oils gets you is a more relaxed maintenance schedule

My car is a 2005

zeroptzero

After reading your reply those numbers seem a bit low based on that oil viscosity and brand.

Any chance of the motor having fuel dilution , which thins oil quickly ? I would send the oil sample out for analysis to a place like Blackstone , see what they find, they can measure for fuel dilution and you will get all of the bearing wear elements along with others.

The minimum Honda spec is 10 psi measured as soon as coolant gauge hits 3 bars.

Charper732

umm that his higher viscosity than what is recommended stock....anyway I just pulled my inline oil filter going to the turbo and there is fking copper in it...lovely. Now lets just pray its the rods and not the mains.