7 replies to this topic

[mikie]

my car has 61k miles but i got it with 58k i doubt the prior owner used syn oil but i notice after a month or so  i always need to add a quart  should I back off and use 50 oil/ 50 syn  liek the durablend theysell or use high mileage oil?  now they have high milage syn oil also

So you've already switched to full synthetic?
I decided to switch to synthetic after my father decided to take my car to a local garage and get the plugs changed and oil changed. They put crappy plugs, oil and oil filter in and needed to add a quart every 2000km. I had no leaks and volvo didn't understand why I was lossing so much oil.

So I put volvo plugs, volvo filter, and mobile one syn. I had the same problem until the third oil change with amsoil syn, my car now is not loosing any oil.

[DEWFPO]

Is your car a turbo? If so synthetic or synthetic blend would be a little insurance over dino. If your car is not a turbo and you use synthetic, you car will still love you just the same.

DEWFPO

[MrWinkey]

As long as the vehicle had regular oil changes before hand I would not see any problem switching to full synthetic at that mileage.

[Helmut Ranff]

I would say that you will use full synthetic 10W30 and change it at 3500 miles

[James A Sousa]

Either you are leaking oil, burning oil, or losing the oil into the exhaust system.

OR - the oil level is incorrect when the car is filled - do not dismiss this possibility. Do you check the oil after your car is filled? How about checking it after one day and everything is filled with oil, just like when you check it 1000 miles later?

I thought I was burning more oil than I was in our "90 744 TI. The car was not really full after oil changes, and I also found that the "add" area on the dipstick was larger than I thought it was, so when I added some oil (a guess at how much it was down) I never really filled it up, so the next time I checked it it was low again.

Once I made sure it was actually full after an oil change, the car did not really burn much oil.

A leak should show on the ground, or on the bottom of your brick (take a look). Burned oil should show up on your spark plugs. Into the exhaust system??? - from your turbo.

You should tell us what car you have, better yet, register and put your brick info and any mods in your signature. This can help a LOT in helping you.

[KLS]

What year, model, mileage, what viscosity oil?

It is somewhat common for synthetic oil to be consumed for the first one to three oil drain intervals. It is removing residue of the previous oil and building its own sealing.

Most synthetic blend oils are no benefit except to the oil companies' profit margin. They charge far more than the oil is worth. There is not enough syn in the blend to do any good, and they're likely to use a lower grade petro base oil mixed with enough syn as a correction fluid to meet the specs. If you have good reason for synthetic oil, stick with it.

Use the highest viscosity oil listed in your owner's manual for the climate. If 15W-40 is listed, use that, or syn 5W-40.


Ken

Edited by KLS, 18 February 2005 - 04:27 AM.

[Patrick.]

I swear by Mobil 1. That certainly is funny that you were losing oil w/ mobil, but then didn't w/ Amsoil... that's certainly something worth looking into.