Beery
Striker
Aye but the burden of proof is yours in that situation. So you need to prove it was there from the start. That is the difficult part.
I’d be civil at first and see if they’ll chuck something towards it, plus the warranty chuck their bit. If they have their own workshop they might do it at cost with no labour or something.
Only go down the route of quoting SoG if they don’t play ball. You can pay to get the oil tested too (check SAE rating etc.) which could help with that proof.
Think its still garage responsibility as only had it for 10 weeks, isn't it?
During the first six months after purchase, it's the responsibility of the seller to prove the fault wasn't there, not for you to prove that it was.
But after the first six months, the onus will be on you to prove that the fault was present from the day you bought the car.
If the attempt at a repair or replacement is unsuccessful, you're entitled to a refund.
But the car dealer can make a deduction from the refund after the first 30 days for 'fair use'.