Silvijus Storozisinas

Hello, im thinking to buy a mazda rx8 with a milage of 37000 km ~ 23000 miles . Its 2004 year ,and its the 170kw 6 speed manual version, priced at 5000 euros.

I asked the person what are the compresion results and he sent me this. 2 files. His quote "In excellent technical condition, which confirms the compression test of the engine in Inchcape Mazda. " Can some of you tell me if this good, i looked up the charts and i still cant figure it out.

NotAPreppie

It looks like those are kgf/cm^2 numbers and they've already normalized it to 250 RPM. I'd have like to have seen the raw and corrected numbers.

Look at the chart I've attached. In the kg/cm^2 column (farthest left) find the numbers from your results. Then follow those rows to the right until you reach the quoted RPM (250 in this case). If you are on the green side of the black line, that is passing. If you are on the red side, that is failing.

In this case, your lowest rotor face is 7.2 kgf/cm^2. Following this row to the right until we get to the 250 RPM column, we see a "score" of 7.4 which is passing. This is lower than the ideal 8.5 kgf/cm^2 but still above the minimum.

I can't say if 5000 Euro (~US$6000) is a fair price because I don't know how car prices compare between our countries. It's incredibly low miles and if the body is in good shape, I'd consider purchasing it at that price in the US if I were looking for one.

Silvijus Storozisinas

Here is the link of the site https://en.autoplius.lt/ads/mazda-rx...l-6087649.html
So at that price and with those results its worth atention ? I mean its worth going to the seller and inspecting the car and posibly buying it. Also with good care. Like adding probably sohn adapter and so on, how much life i can expect from that car.

NotAPreppie

I can't load that webpage at work so I can't say.

It's really impossible to say how long a given rotary engine will last. You can take steps that might help from a statistical standpoint but it's impossible to say if those will help in an individual case.

Also, I don't think anybody has done a proper case study where they measured compression several times over the life of a car.

gwilliams6

Silvijus, you need to find out all you can about the maintenance records of this car. Even at 23k miles it would be wise to replace ignition components, coils, wires and plugs as part of routine maintenance. In a rotary engine car, top performance of all ignition components is critical to the health and longevity of your rotary engine and catalytic converter. That means battery, starter,fuel pump, coils, wires, plugs and intake.

Also in the US there have been a few recalls for all 2004 RX8s. Not sure in your country, but it is worth checking to see if any and all recall work has been done.

RX8 Club’s recommended maintenance schedule, more comprehensive and proactive than Mazda’s schedule.
30,000 miles:
- Replace Ignition coils
- Replace Plug wires
- Replace Spark plugs
- Clean MAF (mass air flow sensor)
- Clean ESS (e-shaft sensor)
- Reset ESS profile
- Clean power steering connections
- Clean battery terminals and clamps
- Replace transmission fluid
- Replace coolant (Mazda FL-22 is highly recommended)
- Replace air filter
- Replace brake fluid (fluid in the brake lines AND the clutch line)
~$300 USD in parts if you shop smartly.

You never know how the car was driven and what may need attention. If you haven't already versed yourself in RX8 knowledge, please, please read the new and potential owners thread, linked here.

https://www.rx8club.com/new-member-f...t-here-202454/