TryingBe

Run a hose from the fuel return to a gallon jug, power the fuel pump for 15 seconds, multiple that the amount of fuel by 240 and you'll have the qt per hour or liter per hour.

I wonder how much fuel volume comes out at the engine bay. Are are you willing to do a fuel volume check?

Because you said, " I thought compression was in the coolant but no coolant missing,no overheating,no coolant in the oil." That indicated everything is working fine. The coolant system works under pressure, by opening the cap while engine is HOT , you release that pressure and coolant/water comes out immediately. When you put water back in and close the cap, there is air in the system which will self bleed if you don't constantly opening a hot coolant system. Did you use 50% coolant/50% water? Sounds there is nothing to be concern.

I read it three times and I still have on idea what you're trying to say.

No. ECU are calibration to use very specific injectors. In addition of flow numbers, there are also injector dead-time and voltage correct to consider. If your car is running fine with the red injectors now, just replace the caps and o-rings.

If only there is a vehicle Volvo made that can match the MPG of my 2000 Honda Insight.

What is your current idle speed?

I no longer have a Volvo, but I upgraded the oil catch can on my GLH to a ProVent 200.

Are thrust angle correct? Are the toe in the rear correct? The rear toe is adjustable. If you do buy the "p80 / p2 Adjustable Strut Mount" you'd want "595 USD + Shipping for the adjustable strut mounts & Luxe Steer™ for Stock Geometry Springs, (use this option if you are using stock springs, sport springs like IPD or TME, or KW coilovers)"

Get it resurface and check for crack.

Nope, just showing I've taking the entire transmission apart.

Easy. Change the real main seals while you're in there.

LMS isn't urban myth, I experienced it.

I'd say burnt valve.

Same your money and order only the gasket.