Conv/Syn, when does syn pull out a lead?

[wemay]

...In general, no specific vehicle, where a modest spec of SM/ILSAC GF4 is recommended by the mfr.

I believe that a conventional will protect admirably when compared to a synthetic up to a certain point (3-5 miles?).
At what mileage does a synthetic start to oulast a conventional. Or, at what point do the attributes of the synthetic become significant regarding wear protection, over the conventional?

 

[possum328]

 

[Realtech214]

Well IMO, just to entertain your nonsense, Synthetics shine in OCI's of OVER 4000 miles. Even in my PYB days I never ft comfortable with oil changes over that. Now I use synthetic and go by OLM. (~6K miles)

 

[dlundblad]

I personally feel about 5000 miles is the general area.

 

[wemay]

Originally Posted By: Realtech214
Well IMO, just to entertain your nonsense, Synthetics shine in OCI's of OVER 4000 miles. Even in my PYB days I never ft comfortable with oil changes over that. Now I use synthetic and go by OLM. (~6K miles)


No need to comment if you consider this nonsense. Just move on.

 

[demarpaint]

Originally Posted By: Realtech214
Well IMO, just to entertain your nonsense, Synthetics shine in OCI's of OVER 4000 miles. Even in my PYB days I never ft comfortable with oil changes over that. Now I use synthetic and go by OLM. (~6K miles)


How about this for an answer? Synthetic oil pulls out a lead over conventional oil the minute you open the bottle and pour it into an engine. It continues to do so over the entire OCI.

 

[wemay]

Originally Posted By: demarpaint
Originally Posted By: Realtech214
Well IMO, just to entertain your nonsense, Synthetics shine in OCI's of OVER 4000 miles. Even in my PYB days I never ft comfortable with oil changes over that. Now I use synthetic and go by OLM. (~6K miles)


How about this for an answer? Synthetic oil pulls out a lead over conventional oil the minute you open the bottle and pour it into an engine. It continues to do so over the entire OCI.

Ok ok, I give up.

 

[HTSS_TR]

I don't feel comfortable with conventional for OCI more than 7-8k, with synthetic I feel I can go up to 15-16k or a little longer. These are my LS400 OCI's for 20 years, 380+k miles without engine problems.

 

[Merkava_4]

Synthetics have a tendency to cause engine noise for some strange reason.

 

[Clevy]

Originally Posted By: Merkava_4
Synthetics have a tendency to cause engine noise for some strange reason.



Nice blanket statement that isn't even close.
Some might however saying they all do is truly absurd.

You're trolling lately has been remarkable.

 

[snowflake]

Extended OCI's (5k+) and cold start up (0*C and below)

as a blanket statement.

 

[HTSS_TR]

5k is not extended OCI, 10k+ is extended OCI.

 

[Swift101]

Originally Posted By: wemay
...In general, no specific vehicle, where a modest spec of SM/ILSAC GF4 is recommended by the mfr.

I believe that a conventional will protect admirably when compared to a synthetic up to a certain point (3-5 miles?).
At what mileage does a synthetic start to oulast a conventional. Or, at what point do the attributes of the synthetic become significant regarding wear protection, over the conventional?


I think it depends on the application. If I'm not mistaken Subaru recommends a 3.5K OCI (severe schedule)with synthetic for the WRX STI. The sames goes for the Dodge Ram SRT10, the manual calls for a short OCI with synthetic.

IMO a quality synthetic oil is better at resisting thermal breakdown and typically keeps your engine cleaner.

 

[Jaymus]

One place where a good synthetic is better than a good conventional is in a turbocharged engine, particularly with oil cooled turbos. You need an oil that's harder to shear. Add abuse to that engine and you will see synthetic "pull out a lead" as far as not shearing as much.

Also, brand for brand and weight for weight, very cold temperature start up.

As far as extended OCI's, brand for brand, weight for weight, the synthetic version will be able to be ran longer.

 

[Jasper8146]

Based on the actual mechanics I have talked to, most all of them believe that a quality synthetic gives an advantage over conventional throughout the entire oci and that this is true to a greater or lesser extent no matter what the application. Their stated reasons for so believing are that the synthetic clings to the metal better and thus there is less wear at start-up and they also stated that whenever they were inside an engine with any significant number of miles, they could always tell whether synthetic or conventional had been used because the engines which had been run with synthetic would be notably cleaner inside and this was true even if conventional oil had always been changed on time. I think almost everyone agrees that for extended oil change intervals, synthetics are pretty much a necessity if you care about your engine. And, most people would agree, I think, that if you're operating in extreme heat or extreme cold that synthetics offer an advantage.

 

[snowflake]

Good thing I said 5k plus.

I don't feel, based on the oh so accurate valve cover cleanliness test, that dino can keep an engine clean for too much further past 5k.