vr4much

I changed the oil and the color is still pretty dark on the dip stick, would the suction device that the dealerships have fix this ?

fendamonky

iTrader: (6)

Care to elaborate on your problem??

How much time has elapsed between the actual change and when the oil is still dark, did you drain ALL the oil, or just the pan, replace filter, etc., etc..

vr4much

No problem at all time elapsed is about 6 months, but I drove it for about 20 mins after the oil change and put it away for the winter, I changed the oil filter at this time too, I just checked yesterday and It was still dark.

I just drained the pan and replaced the filter, this is not all oil ? I had to replace about 4.4-4.6L

fendamonky

iTrader: (6)

When you do an oil change you are essentially just changing the oil in the pan, this doesn't necessarily get all the oil from the engine (still oil in lines/coolers/etc), though it does get a large majority. Depending on whether or not you've got twin oil coolers will play a role in how much old oil is left in the system.

I wouldn't stress it too much, running the car for 20 minutes probably just flushed out all the old (dark) oil from the lines, which is why you're not seeing perfectly clean oil. I really wouldn't worry about it if I were you.

Mahjik

iTrader: (1)

https://www.rx7club.com/general-rotary-tech-support-11/why-my-oil-black-after-only-several-hundred-miles-491002/

dgeesaman

iTrader: (7)

When you change the oil there will always be a couple of quarts stuck in the engine internals. So if you want to get it honey-clean, you'll have to change it twice in a row and run the engine a little in between.

vr4much

Ok thanks for info, I think I will still take it to the dealer and suck make em use the suction device cause I don't know if the previous owner ever did this in Japan.

Sgtblue

iTrader: (16)

Why do you think that is beneficial over it being drained?

dgeesaman

iTrader: (7)

Using that tool will make no difference. The drain plug works fine.

1QWIK7

iTrader: (33)

Just change your oil more in a single period.

The oil on my moms corolla was like cocoa syrup. After an oil change, when i would run the engine for a couple of minutes, i would check the stick and it was dark again. I let her use the car for like a day and i changed the oil again.

Now it seems fine.

I do that to the FD. I do oil changes every 3 months REGARDLESS of miles. One time i did like 100 miles in a 3 month period and i did it anyway. Some people may say its a waste of money but to me, that 13 bucks or so is nothing to me. And i have clean oil all the time.

Past couple of times i changed it the oil looked like brand new, even in the filter. Im almost hesistant in throwing the filter away because of how clean it looks.

vr4much

What I meant to say was I will take it to a dealership, they change the oil plus use that suction device. I'm not saying there is need for that suction device, but I do it just in case, it's just $10 more..

Cgotto6

iTrader: (8)

This is all not worth the hassle in my opinion. People have been changing oil in cars for years the standard way with no problems. Why does everybody think the FD needs special care in every department? I for one will keep spending money on only one oil change per oil changing cycle, no need to spend twice as much to try to get "clear" oil that will be dark in a matter on miles no matter how many times you drain and refill.

Sgtblue

iTrader: (16)

It makes absolutely no difference. Oil is stranded primarily in the rotors as well as the cooler(s) and various internal surfaces. I can't imagine they'll get any more oil out then if they drained it conventionally from the pan...no matter what they tell you. Your paying $10 more to make it more convenient for them. Over the course of a year, that might total $30 to $40...near the cost of an extra change. Money better spent there IMO.