Engine have a little hesitation with new brand oil

[Caiwu]

We switch to new brand oil and find the engine have a little hesitation for several days.Who can explain this?Thank you.

 

[bruce381]

not oil you may have bumped a wire or hose or put something back on wrong OIL will not cause hesitation.
bruce

 

[RI_RS4]

Bruce, you are probably correct. However, a yucky oil with a high volatility might burn off and cause plug fowling or intake deposits. But, it would have to be really yucky oil.

 

[bruce381]

I think he means he changed out the oil for a new brand and now motor hesitates if it was me I would look it over and see what may have been moved or diconected during oil change

 

[Rabbler]

On some engines if the dip stick isn't fully sealed and seated it can cause a vacuum leak and hesitation.

 

[Titan]

I changed my oil the other day, and we had an earthquake that night!

 

[Steve S]

Originally Posted By: Titan
I changed my oil the other day, and we had an earthquake that night!
That happens on occaision.

 

[Gary Allan]

I take it that it stopped hesitating after several days. Did you do anything to the engine during those several days?

(visions of Spock: "Going by the book, Admiral ..hours can seem like days".)

 

[carlprop]

Originally Posted By: Rabbler
On some engines if the dip stick isn't fully sealed and seated it can cause a vacuum leak and hesitation.


Interesting. I've never heard of that before.

 

[Iain]

I've experienced usage problems with new oil types, but never had mechanical problems.

 

[Gary Allan]

Originally Posted By: carlprop
Originally Posted By: Rabbler
On some engines if the dip stick isn't fully sealed and seated it can cause a vacuum leak and hesitation.


Interesting. I've never heard of that before.


It's application specific. My BMW wouldn't idle at all without the dipstick seated. It depends on how the OEM manages crankcase ventilation.

 

[Caiwu]

Do nothing.Do you think the new oil clean the deposit?

 

[Gary Allan]

Well, first it would have to also cause one and then clean it out. It's very unlikely that anything directly related to the oil created this condition.