Posted by Patrick Page on February 28, 2007, 4:42 am
Given that synthetic oil lasts longer, is it necessary/advisable to use
standard 5000-mile interval?
Morongo Valley, CA 92256
Posted by on February 28, 2007, 11:32 am
What does your owner's manual say about synth oil?
Posted by Patrick Page on March 15, 2007, 5:39 am
Posted by Ike on March 16, 2007, 8:15 pm
When Mobil 1 first reached the market, we did the SOAP (Spectrographic
Oil Analysis Program) on our racing engines, and synthetic definitely
lasted longer according to the data. However, those engines subjected
lubricants to very high pressures and temperatures, apparently tolerated
better by synthetic than organic.
I think some aircraft engine makers/users have similar numbers.
The important question is whether the longer life, better protection,
and higher cost all balance out to a net savings. As I see it, if you're
driving a race car or an airplane, probably. But my Prius engine doesn't
get hot enough to hurt when I touch it at the end of a trip, and the oil
looks fresh even at changing time. In these cars, I don't think
synthetic will make a difference.
Patrick Page wrote:
Posted by firstname.lastname@example.org on February 28, 2007, 4:47 pm
For warranty claims, you should stay with the US' standard maintenance
interval. (I assume that you have a NHW20, which has a 6 month/5000
mile interval. The NHW11 (Classic) has a 6 month/7500 mile
interval.) Outside of warranty, you can use whatever interval you
http://smg.toyotapartsandservice.com/ for the US scheduled maintenance
If you were in the UK/Europe, the standard interval is 1 year/10,000
miles. But I hear that the quality of oil is a little better there,
besides the maintenance intervals being a cultural thing... (Much
like how I always get reminder stickers for 3 months/3000 miles on my
Prius, which I ignore and follow the scheduled maintenance guide...)