Hi, Just changed the oil (15w40) and filter on my renault 19 1.4 Once the engine has warmed up, and I keep the revs at 4-5000 for a few seconds, I get clouds on blue smoke. Any ideas whats causing this, could the oil be to thin, sure it never done this before I changed the oil? The car is due an mot soon, will it fail on this?
Thanks.
I hope you aren't just revving the engine up to 5000 rpm under no load - this will damage the engine.
Doubt it 15w40 is quite thick. Is it what is specified in the handbook? Is the oil it certified to the proper specifications (eg API etc). Are you sure you haven't overfilled it?
, sure it never done this before I changed the oil? The car is due
Yes, probably. If you've used the right oil, and haven't overfilled it I'd get rid of it as blue smoke is a sign of an engine in bad nick.
HTH,
Robert
What's the difference between revving the engine up to 5000 rpm under no load and whilst driving? How's it going to damage the engine?
The engine isn't doing anything with the power its producing, so it ends up shaking itself to bits.
Well if it's producing significant power then it'll accelerate past
5000Rpm. Pointless exercise but no more damaging than running under load.MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.