oil & oil filter

Hi everyone;

I have a 97 SL, 130000 km (81250 mi).
I have been having the oil changed every 5000 km (Castrol 5w/30w)
Last change I went for Mobil Synthetic. Noticed a smoother run (maybe
it is a subjective perception of mine).
Question 1: is it advisable to extend to 10000 km the interval of oil
changes with synthetic?
Question 2: from browsing this site, I learnt that Fram is a no-no in
oil filters. Everyone advises against.
So, for next change,which filter brand do you think would be better:
Quaker State?, Valvoline? or, the Fram Synthetic?
The price difference is not an issue, the life of the engine is.
Thanks in advance for all your comments and suggestions.

danielR.

In article . com>,
says...
> Hi everyone;
>
> I have a 97 SL, 130000 km (81250 mi).
> I have been having the oil changed every 5000 km (Castrol 5w/30w)
> Last change I went for Mobil Synthetic. Noticed a smoother run (maybe
> it is a subjective perception of mine).
> Question 1: is it advisable to extend to 10000 km the interval of oil
> changes with synthetic?
> Question 2: from browsing this site, I learnt that Fram is a no-no in
> oil filters. Everyone advises against.
> So, for next change,which filter brand do you think would be better:
> Quaker State?, Valvoline? or, the Fram Synthetic?
> The price difference is not an issue, the life of the engine is.
> Thanks in advance for all your comments and suggestions.
>
> danielR.

I like Mobil 1 oil and PureOne Oil filters for my 3800 and I just change
my oil and filter every 4000 miles. I could go longer on the oil for
sure if I racked up more miles in a shorter amount of time to burn off
moisture and gas in the oil. I take 1+ hour trips when ever I can just
to burn out contaminants. As oil advances so do filters. If a filter
captures more dirt, it clogs up faster. Good filters shouldnt be of much
use after 4000 miles.

http://people.msoe.edu/~yoderw/oilfi...lterstudy.html

blah blah wrote:
> In article . com>,
> says...
> > Hi everyone;
> >
> > I have a 97 SL, 130000 km (81250 mi).
> > I have been having the oil changed every 5000 km (Castrol 5w/30w)
> > Last change I went for Mobil Synthetic. Noticed a smoother run (maybe
> > it is a subjective perception of mine).
> > Question 1: is it advisable to extend to 10000 km the interval of oil
> > changes with synthetic?
> > Question 2: from browsing this site, I learnt that Fram is a no-no in
> > oil filters. Everyone advises against.
> > So, for next change,which filter brand do you think would be better:
> > Quaker State?, Valvoline? or, the Fram Synthetic?
> > The price difference is not an issue, the life of the engine is.
> > Thanks in advance for all your comments and suggestions.
> >
> > danielR.
>
> I like Mobil 1 oil and PureOne Oil filters for my 3800 and I just change
> my oil and filter every 4000 miles. I could go longer on the oil for
> sure if I racked up more miles in a shorter amount of time to burn off
> moisture and gas in the oil. I take 1+ hour trips when ever I can just
> to burn out contaminants. As oil advances so do filters. If a filter
> captures more dirt, it clogs up faster. Good filters shouldnt be of much
> use after 4000 miles.
>
> http://people.msoe.edu/~yoderw/oilfi...lterstudy.html

hi everyone;

Thank you very much for all your comments and suggestions.
Based on the folowing facts:
I live in Toronto, Canada, and operation under cool temperatures is an
important factor,
Most of the filter brands you mentioned in your replies are well
considered in a site dedicated to oil filters comparison :

http://minimopar.knizefamily.net/oilfilterstudy.html

,but in Toronto I only have access to Fram, Valvoline (designed by
Purolator people), and Quaker (Fram disguised under different name).

I will go for Valvoline.

Regarding the type of oil and frequency of changes:
I will remain with synthetic.
Now, at onset of Spring, will stretch the synthetic I have to 6400Km
(4K miles), but in Winter, I believe it will make more sense to change
every 3K miles (approx 5000Km).

Thank you all again.

danielR