15000km service interval means full syn oil only

[impulsesv6]

got my car serviced today, and just some facts ive found out about oil to use in the alloytec motor:
with the 15000km service interval vehicles need a long life oil, as mineral oil in only designed to last 5000km (avg) and semi syn only approx 7500km, the only oil for thses cars are the fully synthetic, i run castrol magnatec 5W40, as recommended by autoleaders, and they wony warrant the use of mineral in cars they service that have long service intervals,
this claim has also been backed up by the local mobil distributor, they wont take part in any claim where the recommended oil hasnt been used, this being their Mobil 1 fully synthetic,

so why would the holden dealers recommend and mostly use mineral oil?

 

[impulsesv6]

alloytec throttle body mods?

have heard that the throttle bodies on the alloytec can be modified but ths was through a friend of a friend, does anyone know if this is true? and how is it done? i get the feeling this friend of a friend was talking about those ebay crappy attachments

 

[impulsesv6]

oops wrong place to post, please remove last post

 

[Not_An_Abba_Fan]

It's not kms that degrade the oil it's time. The additives break down. The distance is only averaged out for the time between oil changes. If you do a lot of k's then the oil will go further but still only the recommended time frame. As additives get more advanced, they last longer, hence the reason for longer service intervals. As for mineral oils not lasting as long as synthetics, thats only true for fully synthetic bases with no additives. Once you start putting additives in there then they break down just as fast as mineral oil. The additives are there to stabilize the oil, stop seal swell and hardness and to prolong engine life by reducing deposits.

 

[twb1979]

Yeah but if you love your car....would you really leave your servicing intervals every 15,000kms?

I can understand fleet and govt. cars getting their oil dumped every 15,000kms, but if you plan on keeping your car for a few years then I can't see the logic on trying to save a few $$$ on oil and servicing.

I run Mobil1 5w/50 fully synthetic and get it changed every 6 months or 7500kms religiously.

 

[andyman]

so why would the holden dealers recommend and mostly use mineral oil?

i certainly hope they dont use mineral oil the alloytec engine, lets just say they will be doing a lot of warranty work on them if they are