Oil Needed For 03 Yaris

[MRichards]

I'm planning to do an oil change on my 2003 1.0L Yaris and I'm wondering if it's better to put in 10W-40 or 5W-30? 

Euro Car Parts recommended that I used 10W-40 so I purchased some Semi Synthetic Triple QX 10W-40. Coming to do the job I remembered that normally I use 5W-30 but is 10W-40 still good to use?

Thanks very much! :)

[bathtub tom]

It's not the viscosity of the oil you need to worry about (I doubt if your engine will mind 10W-40 instead of 5W-30) so much as the specification.

What does your handbook advise?

[MRichards]

Cheers for replying, the handbook advises 5W-30 or 10W-30 to specification API SJ or SL. The oil that I have bought is to specification API SL/CF so it should be good?

[bathtub tom]

1 hour ago, MRichards said:

 the handbook advises 5W-30 or 10W-30 to specification API SJ or SL. The oil that I have bought is to specification API SL/CF

That should be fine for a 14-year-old car, but in future you may like to keep to the original specification, unless engine wear indicates something else may be preferable.

[MRichards]

For anyone potentially looking at this thread in the future, it's been 8 weeks since the oil change and car is running great. Hasn't drunk any oil and runs as it did before :)