oil change NOT

[emlclcy]

I got my Passat 2ltr petrol estate about 3 years ago, it was a barn find, flat tyres full tank of fuel, she started first spin after a jump. sailed through the mot with no advises so I put an lpg conversion on it. 3 mot's later still no advises but I'm trying an experiment, the car had 85k miles on the clock when I got it, I changed the timing belt and oil and that's it so far, well apart from 2 sets of plug leads 2 crank sensors and 2 ignition coils ~(only get genuine parts, even if they are second hand) with 143k miles on the clock now, same oil, still brown, just top it up maybe once every other month. no rattles. so I'm seeing it I can get to 200k miles on the same oil