oil change question

[maccavvy]

I have it done once a year at the fish (10k ish)

would you recommend a interim oil change and if so what oil grade is best.

im more than capable on the spanners so I could diy it and save the receipt.

[maccavvy]

I always keep forgetting to put car.. used to forums where its next to avatar or in the sig.

its a ls1 cv8 Ro .

pm enroute.

[maccavvy]

how come people use different grades...any reason for it , theyre wildly different prices even on same brand.

[maccavvy]

a very interesting if slightly baffling read.. I need a laymans option lol

gonna be ordering soon . for my normal driving in a mid uk climate.

would 10/40 or 5/30 be better , or what would you recommend.

Edited by maccavvy on Monday 31st August 14:48

[maccavvy]

appreciated guys...

[maccavvy]

ill be purchasing a good branded one or even a trip to the dealers they aint that expensive I heard