10-02-2016, 11:27 AM
(09-02-2016, 01:00 PM)powerandtorque Wrote: DV6's won't die because you use one brand of oil over another, providing that it's the correct spec/grade and is changed as per the servicing schedule.
They'll die primarily because of the injectors carboning up the oil and blocking the turbo oil feed.
IMHO it's all to do with people using shit oil and under extreme temperature it decomposing and going to shit from the heat of regeneration, rather than staying stable. Same as PDs with shit oil in - it's why they eat their cams, same as the V6 TDi.
One of the main reasons other than better machining tolerances that engines have dropped in displacement and improved in efficiency is due to improvements in lubrication technology - you couldn't get engines reliable on any old oil! There's a good reason that an XUD9s 'recommended' is 10w40 semi synthetic, the DW10 HDi is moved onto 10w40 fully synthetic, they switched to roller rockers and hydraulic lifters in the valvetrain for reductions in internal friction which require better lubrication tech than bucket-over-shim designs...
IMHO good quality oil is the key on modern motors - frankly race engines have an easy life in comparison, they don't have to deal with oil dilution from regeneration, oil dilution due to the fact the air filter hasn't been replaced in the last 40k, 12,000 miles service intervals (if you're lucky - people never service their cars on time!) on the old 10/40 semi that was on the wall at whatever backstreet garage the owner took it to last time, repeated cold starts, never getting up to temperature and some redline for a good time 5 seconds after the motor was started from cold... It's no wonder that DV6s get the reputation they do, 'oh it's only a shitty peugeot' they say, 'it's not a race car' - then moan when it goes wrong, but also moan when it doesn't do 80mpg and produce 140hp!
