Can Engine Oil be Mixed?

[Vit4wd]

Can we mix fully synthetic engine oil? - Eg. Esso Ultraflow 5W40 with Shell Helix Ultra 10W40?

 

Will this damage the engine?

Edited January 25, 2007 by Vit4wd

[Acaj]

why mix ? more power ?

[Silhoutte]

I dont think that it will really damage the engine but not too good to mix as they are of different formula.

[Octopus]

My guess is depending...... some oil are ester based, and I read somewhere that they do not mix well with the 'normal' engine oil.... sludge may develope in the engine in case additive clash....

[Ccssgm]

If Mix....Servicing Period will Be 10K + 5K / 2 = 7.5K ......

[Trex101]

My take is, if it's from the same brand but different viscosity, it's ok to mix.

If it's different brand, no adviceable to mix more than 1/3 of different oil.

[Aggroska]

Hi bros

 

If currently i am using 5W40 for my ride, can i change it to 5w30 when i do my next engine oil change? Will there be problems if make the change as 5w30 is semi-synthetic whereas 5w40 is fully synthetic..

 

Thanks

[Xefera]

It depends on many factors e.g. age of car, condition of oil seals, etc

 

I've read somewhere before that you can upgrade from mineral to semi-sync to fully syn, but not the other way round. But I believe there are people who did that before (including moi) but no serious problem with the engine after the switch.

 

Its down to personal preference I believe.

[Trex101]

If it's a oil change, no problem at all.

[Watwheels]

I dont think that it will really damage the engine but not too good to mix as they are of different formula.

 

Can mix. Both are synthetic oil. It's just that they are of different viscosity. They are lubricant to your engine parts so no harm done.

 

I verified with a mechanic I know. He also said can mix. I had done it b4 too when the engine oil level in my car dropped. I was using 5W40 and I bought a 1L 0W30 o top-up.

 

Not to worry.

[Aggroska]

Hi bros

 

Thanks for the clarifications as was thinking to change to 5W30 as it i heard it gives better fuel consumption rather than 5w40. Is this true or should i just stick to 5w40?

 

Thankss

[Watwheels]

If u really must use or change to "thinner" oil, my advise is increase the frequency of your oil change.

 

I stick to the recommended grade.

 

If u want to experiment, by all means go ahead just be sure what u'r doing.

[Sky8807]

I have been mixing for years now. Currently, my engine oil is a mix of 3 different syn brand, don't see any problem in that. Of course if possible, don't mix, use the same type.

 

 

reply]Can we mix fully synthetic engine oil? - Eg. Esso Ultraflow 5W40 with Shell Helix Ultra 10W40?

 

Will this damage the engine?[/reply]

[Evilernie]

Any recommendation on the for Engine Oil for a 1992 Civic? Heard of a brand called Redline Oil sound good any feedback?

[Siao_liao]

dun think haf any problem wif that..

[Wilb]

Don think got much effect by mixing. Blending is a better choice, if u got your own fomula and quantity, i got some experience in Lubricant industry/additive part

[Garunguni]

No concrete basis at all.

 

Thin oil such as 20wt/30wt in fact is the recommended viscosity for Japanese and Korean makes nowadays. Its becoming a norm now to see thin oil being recommended in their manuals or bulletin boards.

[Trent892]

The temps they see over in their respective countries of manufacture means they can run thinner oil than in our climate. having said that, the thinner the oil the better the fuel consumption, all things being equal. but if you track better to get a slightly thicker grade of oil. i'm using Motul's 300 Chrono 10W-50.