The concern with the high detergency of synthetic oil comes from the risk of
seals leaking if they have hardened and are depending on deposits to
complete the seal. Normally this is in cars over 10 years old (although in
very hot climates seals may harden in as little as 5 years) and with a
history of infrequent oil changes. I have succesfully changed over engines
with more than 200K miles - my 1985 Volvo and my daughter's '93 Accord (at
210K miles). The Volvo spent most of its life in Phoenix but got regular oil
changes.
On balance, higher detergency is good for the engine as it prevents deposits
from building up. It isn't a good idea to change an engine to synthetic
*before* 10000 km because synthetic can lubricate too well, interfering with
proper break-in. This is apparently less of a problem with modern engines.
Mike
"stylesandsmiles" <oelias0546.DeleteThis@rogers.com> wrote in message
news:xJOdnYGz3NPasQrcRVn-3w@rogers.com...
> If you have been using your car for over 10,000 km's do not use synthetic
> oil!
> Contains too many detergents and will harm your engine!
> Maybe it is time for a tune up?
> Where in canada do you live?
>
>
>
> "kyle lallave" <projectcivicsl.DeleteThis@triad.rr.com> wrote in message
> news:4tAld.2379$DE1.136424@twister.southeast.rr.com...
>> as i told a guy earlier its cause u may wanna leave it running for awhile
>> cause it is prob frozen in some parts or really freaking cold that the
>> engine is just soo cold it will do that....maybe try synthetic oil
>> maybe...
>> "Sam Cormier" <300zx.DeleteThis@nbnet.nb.ca> wrote in message
>> news:FTekd.175720$Np3.7085168@ursa-nb00s0.nbnet.nb.ca...
>>> Hey guys it's winter here in Canada and when it's cold
>>> or even below zero my 99 Civic likes to idle low (so low that it
>>> shakes and the lights dim alot unless I pump her some gas).
>>> A few times it's even stalled on me... This happens after driving
>>> for 10 to 15 minutes even... it's fine from start. Another thing I
>>> should
>>> mention is that after it stalls... and I restart it... it's fine...
>>> idle's
>>> fine like
>>> nothing even happened... wtf?
>>>
>>> Anything simple I can check or replace before the Honda
>>> guys rip me off bigtime??
>>>
>>> Thanks!
>>>
>>>
>>
>>
>
><!-- ~MESSAGE_AFTER~ -->
>> Stay informed about: 99 Honda Civic Ilde Problem