Engine oil flush and now vibrations

[Mazda5pro]

I have a 2003 P5 with about 224,000km, did a engine flush a few weeks back and now I get a tremendous amount of engine shake.
so I put the flush solution in the engine and ran the engine at 2500 rpm for about 10 minutes. Flushed it out and did an oil change. The directions on the bottle said nothing about keeping it at 2500 rmp but I did it anyway. The oil hasn't been changed is so damn long thought it would help. Also directions from a guy on Youtube.

The car runs fine, Idle level is good, but the shake, feels like I'm rolling around in a motorcycle. Is there anything I should check that would cause this? I may have too much oil but not by much. Would this cause it? I may flush out this oil and add the right amount once again. The oils not very clean, even after the flush. Still quite brown. It's also really hard to tell if the oil level is good from looking at the dip stick.

any input would help.

Thanks

New to the forum btw

 

[Valk]

shake would mean missfire to me. does it stumble on idle? or sound like a subie? if the oil is getting cloudy that quickly, its possible your head gasket is leaking.

 

[Mazda5pro]

It doesn't stumble on idle but does kinda sound like a subie now that you mentioned it. lol and with no mods.

I just drained about 2 quarts, and the oil was black! Could it be all the sludge that the flush solution is now releasing? It been about a week since the flush and oil change. I may have to do another complete oil change tomorrow.

 

[Valk]

I think the guide for that was to run it through, change the oil, drive a couple hundred kms or somthing and change the oil and filter again. then the oil should be clean. if not, you have other problems.
you did make sure not to use the booster line with the one way valve in it right?

 

[Shue Her]

Run another oil change if you can, and check the oil level. If its too much oil then the oil can overflow the pistons and can cause engine to not run properly. But try using some Lucas Oil stabilizer cause that engine is getting older.

 

[Valk]

Oops p5. No one way valve lol my bad was tired.

 

[Mazda5pro]

Resolved, drain some oil and ran the engine again and was smooth.

oil still dirty though I'm going to change it soon. I'll try some of that Lucas oil.

Thanks