Your right but you must remember pip is not means tested so many on here are extremely wealthy receiving the same state benefit as you.
your question and my answer will no doubt quickly be seen as irritating to many but it’s a valid question as what’s the point of help with transport if you cannot afford to run it.
so my advice depending on your circumstances you need to investigate the possibility of an electric vehicle on a cheap electric tariff or and a grant to help toward the purchase of a vehicle from the Charitable section of Motability
I am the carer / driver for my wife who cannot drive due to disability