My high mileage diesel Hyundai i20 CRDi has developed a sluggish starting problem, is it time to get rid of it?

My 2011 Hyundai i20 CRDi 90PS diesel has developed sluggish starting and oil splashed 3/4 way up the dipstick (checked after overnight standing). Coolant level remains normal. The engine has often cut...

What's the best engine oil?

What's the best engine oil?

Which engine oil should I use for an LPG conversion?

I am unsure of what engine oil to use for my 1999 BMW 316i compact. It has a 1.9 engine converted to LPG and has done 189,000 miles. Haynes manual says 15W 40. The online 'tap in your reg' section give...