I’m the happy owner of a 2010 Sport, purchased used a few months ago with about 2,000 miles. Of course, one of the first things I did was check the oil and found it to be at the proper level. I watched the consumption over the next few thousand miles, and had to add a half-quart here and there, no surprise.

Then, a few weeks ago, it was time for its first change. Considering I live right down the street from a Mazda dealer (though not where I got the car), not to mention wanting to be free of the worry of oil disposal, I took it in for the work.

Naturally, I didn’t check the level for a while after – about 800 miles, as it turned out. And when I did, I was horrified to see the level about 1-2 quarts high! I returned to the dealer and the service manager acknowledged there had been an intermittent issue with their bulk filling system. My response was to ask why the service tech, knowing this, didn’t check the level afterwards, and the manager couldn’t tell me. While they then drained and re-filled the engine, suffice to say I won’t be returning to this Mazda shop, regardless of its convenience.

My question here is: How concerned should I be about damage, current or potential, to the engine?

 

Searching will become your best friend on these forums ...

no real damage on the series 2. The first series RX8 had its filler neck vacuum line connected to the intake so there was a chance of oil getting into the intake. It is a bit different on the S2 so there shouldn't be as large of a risk. If you do have some rough idling and stalling though, it would be wise to take a look in the intake tube connected to the throttle body.

 

Hi and Welcome to the club, if I have not already done so

Jeez, bloody stupid mechanic at dealer...don't they check the oil level after a fill..I guess not...those auto fill or set and forget fillers are BS.

As Paimon said all should be OK.

What I do with oil check ups...

I check at the same location (in carport where floor is pretty level).

I don't do this wait 5 minutes after hot engine and then check BS...as it is a PIA.

I always check in the mornings or when stone cold.

YES, to be correct level in Oil Pan and therefore Dip Stick when cold the reading is about 4-5mm (1/4 inch) below the Full line.

When I do need to fill , I have a 1 Litre (quart) plastic oil bottle with measurement lines, I turn it upside down as bottle has one of those twist openers (on ketchup sauce bottles), and I squeeze in a few hundred mils (or ounces) of oil, turn off twist lid, and no mess.

Just be consistent in how/where you check.

 

My stealership consistently fills mine 1/2-1qt high.
They've been changing my oil since I bought the car (every other is free). I've seen no issues over almost 2 years and 30,000mi.

 

it's a rotary engine, not a reciprocating engine with a crankshaft exposed to the oil sump

it is a completely harmless situation, though you could overfill it to the point that oil would back up the crankcase vent hose into the intake accordion tube, that would take more than 2 qts though and it would also be full up to the oil filler inlet neck

just curious as to how you knew it was actually that amount?

 

A rolleyes smilie? Interesting.

Anyway, if you refer back to the OP, you'll see I estimated 1-2 quarts. I based this estimation on the distance from Full, calculated on the increments as provided on the dipstick.

You're welcome.

 

so are you

 

why are you always acting like an *******...

 

That estimation would only make sense if the volume of the oil sump is the same above the full marker as it was between dry and the top "dot" lol...i think that is what Team was getting at

edit: not to mention the impressive feat of fitting 7 quarts of oil in a 5 quart oil system that only gets about 4 quarts drained through conventional methods.

 

Nevermind him, here's what Mazda says on page 8-13 of the 2006 Owner's Manual (There's likely the same one in yours): "Caution! Don't add engine oil over 'F'. This may cause engine damage."

It doesn't say how much, 1 qt, 2, 3, 10, it says what it says. You may wish to point out this warning to your dealer and have them log the overfill error in the car's records. That way, if something happens later, it's officially their fault.

IMO, odds are, if it hasn't caused an engine problem by now, it won't in the future. But I'm not an expert.

 

I put too much oil in my RX8 and this happened: