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Thanks everyone. The car is tuned up and has had techron regularly. I was thinking about having the injectors bluprinted just in case there's a problem there. Car has had an issue where I need to wait a few seconds after turning the ignition on so the fuel pump has some time to pressurize...

I *just* bought a 10-pak of the Mann...

Thanks Pablo. I thought Al doesn't really move around much with engine miles? I think I will go with a 10W40 next change and see what that does. If no improvement then it's on to ARX.

I think I will try a lighter weight at the oil change. I'll keep the 15W40 in here for the summer since I just changed it. Then I'll switch to a lighter grade. Maybe that will bring the Al down? Again, is 11ppm Al really that bad? BL isn't too concerned. What's the long term effects? 250K miles...

Thanks everyone. The car is getting up there in age but it has not been neglected since I got it at 125K: Tune up = 137K (plugs rotor wires air filter) Front O2 = 132K PCV and knock sensors = 133K Timing belt/pulleys and Coolant changed at 140K (thermostat OK) Vacuum tests OK at 18mm Hg...

I only use Mann oil filters. They have a check valve. If I don't use 15W40 then what should I use in a conventional oil? 10W30? The car sees a lot of hot weather driving, especially with the summer coming here in TX.

thanks for the post. Car is used for the usual commute slog. A little bit of highway but mostly stop and go. Car has had a tune-up with fresh plugs. I will check the air filter. It probably has about 10K on it. Anybody worried about the aluminum? A previous report mentioned it might be normal...

What do you think?

Why would there be solid deposits in the oil after the rinse phase? I thought ARX was supposed to liquify sludge, etc. and suspend it in the oil.

Thanks for the reply! Apologies to all for not including the oil change information in the title... The front O2 sensor has been changed and the throttle body is clean. Air filter is pretty clean. The last time I pulled the plugs for a compression test (which was good) some folks thought the...

Oil analysis indicates piston scuffing? But report goes on to say nothing seriously out of line. Should I be concerned? What type of fuel problems are they referring to? Thanks!! Oil = Castrol GTX Diesel 15W40 Miles on oil = 3032 Miles on engine = 136668 4 months time between oil changes...

Isn't 12 a little high for silicon?

toyota62, just went back and reread this thread and I just realized YOU CALLED IT!!! The air temperature sensor popped out of the air intake! Wow, you're good!!! I was checking under the hood today and saw the sensor hanging there and to be honest I had to look it up in the factory service...

Sorry to resurrect an old post but I finally got around to looking at my MR2. While I couldn't test the vacuum because of the problem in my last post, I did notice that the intake air temperature sensor had popped out of the air intake! I put it back in and I'm hoping the idle will smooth out a...

Well, I tried to hook my vacuum gauge up to the car but I realized I didn't have the right hose to make the T-connection. I've got to hit the auto parts store and but some 4mm hose!

I didn't warm the car up enough before I took the sample. Couldn't that have something to do with it?

Thanks for the replies. I've put some thought into the oil I'm going to use and I think I've decided on Delo 400 15W40. I like the additive package and I'm just not ready to make the switch to synth just yet. Hoping to do another analysis with the Delo and see what numbers I get back. If I can't...

Thanks for checking. I haven't had a chance to check it yet. I was too busy this weekend so I decided to drive it around rather than work on it!

Thanks! I checked the vacuum lines and physically they looked OK. I'll hook up the gauge and see what's what. It occasionally idles a little rough too now that I'm noticing it.

Thanks. I'll take a look. Any idea how much vacuum I should have at idle?