When should I change the automatic transmission fluid on my car?

I bought a used Toyota Yaris 2013 with 122,000 miles but no maintence records. The ATF is black but there is no burnt smell and the car shifts fine. Some say drain and filling the ATF might cause slippage.Others...

Will using 5w30 oil instead of 5w40 cause problems?

My 2016 Nissan Juke 1.2 DIG manual says that the oil recommended is 5w40. I’ve recently had a service with the main dealer and they put in 5w30. Will this cause a problem?

How expensive is an oil change?

A garage charged me £112 for engine oil for a Toyota Hilux oil change. Would this be right as it seems very expensive oil?

Have I been overcharged for an oil change?

My Peugeot 2008 1.2 Puretech had an MoT and oil change a year ago and I have just noticed I was charged £68.47 for oil ! This seems an extraordinary amount, no quantity was listed. Can you tell me what...