Have a question on how long to run this synthetic oil.
My work truck, they run regular filters, synthetic oil, and run it for
I started doing the same in my wifes new car, and my truck.
Is 6K too soon? can this stuff really go to 12K? or 9K?
Should I be spending the extra on the synthetic filters... which i've
found very difficult to find on the shelf so far... ?
My wifes cars manual says 8000K KMS for an oil change... so thats about
4K+ ... so i didn't think going 6K mi on the syntheic would be pushing
it... but i'm approaching it now.
Where synthetic oils excell is when we experience temperature extremes...
either raging cold or unsufferably hot. For anything else, synthetics are
much of a bargain.
For the oil itself... are you selecting a PAO base stock oil or are you
opting for "hydro treated" conventional oil base stock. PAO base stocks are
more stable than hydroisomerized base stocks... They are better at resisting
viscosity change at temperature extremes and they (as far as I am led to
believe) resist shear in conventional use (but I am also led to believe that
shear can be a concern when the oils are used in a hydraulic type situation
as found in diesel engines with HEUI injection systems).
Oil change interval... 8000Kms is 5000 miles... and yes, since about MY 08
or 09 (memory thing) standard duty maintenance schedule is 6 months or 5000
miles. Pretty good in it's own right....
While conventional oil may begin to exhibit viscosity change due to
molecular shear as it approaches the end of it's service life, one of the
biggest concerns remains to be add-pack depletion... The add-pack is the
"secret sauce" that is added to oils to combat acid formation, foaming,
detergents, additives to keep impurities in suspension so that they vcan be
carried to the oil filter for removal... Lord knows I'm only touching on the
big stuff and forgetting so much (I'm not a petrochemist, I don't play one
on TV and I didn't stay at a Holiday Inn Express last night).
While many synthetic oil purveyors are suggesting extended oil change
intervals, Ford of Canada is insisting on copies of maintenance records for
most mechanical failures. If your records show a chronic lack of
maintenance... don't shoot me - I'm only the messenger. If you get someone
to "cook" some receipts for you.... then you wont be welcome in my house...
dishonest is dishonest. (Recently we had a customer insist his 09 diesel
truck wasn't modified.... the tech still had trouble gettig our factory scan
tool to communicate with the truck - and then we noticed the piggyback
connector for the diesel particulate filter delete... how can we deal with
someone that lies to us?). Modern engines are a bear to repair or replace...
Back to the oil..... Synthetic motor oils may offer "some" improvement in
fuel mileage.... I do not know if producing PAO base stocks creates another
problem in place of any petrochemical considerations - could it be that
producing PAOs uses the equivalent (or more) of conventional oils/fuels to
produce it? Hydroisomerized base stocks depend on conventional oil for their
production so there isn't a whole bunch of "save the planet" to be had
I've been involved in the automotive trades for over 40 years.... I had my
brief fling with synthetics... today? All of my vehicles get conventional
motor oils - all of them are changed at the recommended interval... From
what I have seen..... I will not discourage anyone from using synthetic
lubricants - I WILL discourage people from trying to run extended change
intervals - I don't think that Joe Average will ever see the benefits of
synthetic MOTOR OILS repay the monies paid for their use.
The only engines that benefit from using synthetic oils are stationary
engines that run at a constant RPM. The only automobile engine that I can
think of that would benefit from using synthetic oils are the generator only
types used in true electrics, like the Volt that run at a constant RPM.
Semi synthetic oils are a better choice for the average conventionally
powered vehicle engines IMO.
Would you would recommend ignoring the requirements of auto
manufacturers that specify syntheic oil? Why do you suppose some
manufacturers require syntehetic oil for some engines (for example GM
requires synthetic oil for Corvettes and some Cadillacs)?
Vostok Russia coldest recorded temperature -91 degrees C, -132 degrees
like to see your dino oil there ;)
Naw, i'm joking, i'm only on my first two synth oil changes. (by two
meaning i put it in two vehicles for the first time and haven't changed
And that means they should be scrap in 3 to 7 years????
When a car is sold at 7 years of age, it should still have a lot of
,life left in it. When you trade it in you want to get a good
And when I buy that used car, I want a car in good operating
I am not sure that it will make that much of a difference in most cars.
Most cars don't have major problems that could have been prevented by
using synthetic oil. When I got rid of my old Contour, with only 165,000
mi on the odometer, the engine was running perfectly. Unfortunately, the
tie rods ends, springs, brakes, and cats were wearing out. I am sure
that had I kept the car, there would have been problems with other
components, too, like front shocks, alternator and A/C fixes. Plus, I
tend to put a lot of highway miles my car. I don't want to get stuck out
of state. Once was enough when the tie rod broke on my new Focus. (That
happened after some lady decided that it was fine to back up real fast
in a Staples parking lot without the benefit of a clear view out the
rear view mirror thanks to all the stuff in the rear seat - she hit the
wheel causing the damage to the suspension.)
I don't know if people who keep their cars for a long time (mine was 11
years) really benefit from synthetic oil.
Nonetheless, it does a better job of lubricating and protecting the
engine that conventional oils.
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