To think if 1 DC has a part-time job and saves, they lose out on financial support?

[ChewableHair]

DS1 has a part-time job and can afford to purchase his own driving lessons and car. DS2 doesn't have a part-time job and can't afford to purchase his own driving lessons and car, so FIL brought both for him.

AIBU to think this isn't very kind? There's only a year between them. DH thinks it would be rude to mention it...

I would decline that so-called offer.

Unless there's a valid reason why DS2 can't work, I think it's shockingly unfair. I would say something although I can imagine my parents doing something like this for my sister's children and not mine. (Our kids are too young to drive but other stuff like this has happened. If I object I am told I am"being difficult"and "spoiling everything".)

I would either return the money explaining why or tell fil you will be spilling the money between both of them.

Misses point but- what part-time job pays well enough for a 17/18 year old to buy a car and insurance??

@WitchesGlove he works for Tesco: 3 shifts a week... He gets £580 a month as he works a Sunday (where his pay becomes £11 something).

Nope, no previous discussion, we went on his birthday and car was there. Driving lessons are not booked yet though (but he has a voucher thing for the first 10 lessons).

I'd pull them aside and explain what the problem is, they may just be ignorant

Well, I hope they're just ignorant, otherwise it's encouraging lazy behaviour!

I think it's awful to reward someone for doing nothing and punishing the other for working! I never understand people who do that. Why?

YANBU at all, although you wouldBU not to say anything.
You have to explain to them that it is completely unfair to treat the 2 grandchildren so differently, and that they need to either show equal generosity to dc1, or share what they have given equally between the 2, or not give the gifts to dc2.
That - presuming there is no massive backstory you are going to mention in a drip feed - is completely out of order, and, tbf, I think it it had happened to any of my dc, they would have pointed it out to the grandparents themselves.

Really not fair. About time DS2 had a PT job as well.

How is DS2 going to fund running this car?

My parents bought my older sib a car, I funded myself and my younger sib they paid the insurance for.

We were all at the same point in life and all financially the same.

20yrs later it still rankles and it has set a precedent of my eldest sib, never really saving and being given stuff.

That's really unfair to DS1.
I'd have to say something to FIL about how unfair that is.