Is it safe to mix different oils?

[DP.]

When i had my DC5 serviced by Honda in macclesfield they put in Esso Ultron oil, searching on the internet reveals this is 5W-40 Fully Synth.

When i went to my local honda (Holdcroft) they said they only sell the 15W-40 semi synth and thats the right one for my car.


So im just wondering what the effects of mixing oil are.... I am planning on going to a trackday next weekend and want to know what oil to top up with lol

 

[MJ Type-R]

Don't do it!

My advice, provide the Dealer with the oil at the service.

The price Dealers charge for oil is OTT!!

A good dealer wont mind you doing this.

Use Fully Synthetic as well.

Mike

 

[DP.]

right ok.. but what if i cant find this Esso Ultron anywhere? im i ok using another brand of 5W-40?

 

[MJ Type-R]

No!

I would advice against it. Different brands of oil with the same viscosity rating, may have different additives etc...

Mike

 

[DP.]

right ok.. so what your basically saying is... if i cant find the matching oil that they put in then i need to drain it all out and replace with my choice of oil....

and if i do replace the oil should i stick to 5W-40 fully synth still?


cheers

 

[SiKBoY]

Thats what I did I dint know what was in it so I bought the oil myself and told the dealer to put that in, at least you know exactly what is in there !

5w40 is what I put in mine (Mobil)