synthetic motor oil making engine smoke?

green

New Member

Apr 26, 2003

291

0

0

May 23, 2007

#1

• May 23, 2007

• #1

hey, hows it going, for the past 6 years i have been just using quaker state regular motor oil 10w30 with no problems, but this year i decided to use a synthetic motor oil (castrol syntec) i had it in my car for a couple of weeks now but i now find my engine smoking quite a bit, it has never smoked before. is there any reason for this? i hope its something minor , and that the oil did not hurt my engine. thanks.

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

3

58

Port Elgin, Ontario

May 23, 2007

#2

• May 23, 2007

• #2

probly cleaned some sludge out that was sealing stuff up better.....or it's just a coinsidance

 

S

speedytang

Founding Member

Jul 28, 1999

765

1

17

Marengo,Ohio,US

May 24, 2007

#3

• May 24, 2007

• #3

I would put regular oil back in the car. I would guess that your rings or valve stem seals are not sealing tight with the synthetic.

 

ninety15.0

New Member

Mar 10, 2004

1,336

0

0

May 24, 2007

#4

• May 24, 2007

• #4

Conventional oil is comprised of all sorts of varying chain lengths from real short to very long while synthetic oil has much more consistent chain lengths. The short chains in conventional oil find their way into gaskets or pinhole leaks and seal them up. When you change over to synthetic this no longer happens and you wind up with leaking/blowing oil. Change back to conventional

 

green

New Member

Apr 26, 2003

291

0

0

May 24, 2007

#5

• May 24, 2007

• #5

thanks for the info

 

S

Sicarius428

Active Member

Jan 6, 2004

2,085

5

49

May 24, 2007

#6

• May 24, 2007

• #6

Synthetic also has more detergent in it which is probably eating away at all the gunk that the old oil left... After I did my first synthetic oil change, all sort of gunk came flowing out.
Kevin