The answer to your question: when to put synthetic oil?
Never.

Save your money and go out to dinner on the savings between cost of the two
oils.
Your Honda engine was designed for petroleum based oil. It can last a minimum
of 250k miles; if serviced regularly, as Honda recommends. There are many
Hondas driving around with high mileage and I'd wager that few have used
synthetic oil... Many of them have probably had less than consistent
maintenance... to boot!

Remember this: Contamination and/or dirt is the enemy.

ALL oil gets dirty and contaminated, (yes, even expensive synthetic oil.) So
why would you put synthetic oil in your engine, then not change it for 25k
miles, as some synt/oil packagers' suggest?


harry wrote:

> Just had my 2005 Accord changed oil for the first time 3000miles.
> I brought 6 qt of Mobile 1 Synthetic oil to the dealer ready to start using
> it but the service department recommended that I should use it at next oil
> change instead of now??
>
> I am not quite sure what he explained to me but I am pretty sure they are
> not trying to save money because this is a free oil change as part of the
> deal purchasing from them. I will assume that they would like to use my own
> oil save them some...He also mentioned that I should put in Mobile 1 at 7500
> miles and then change it every 7500 instead of 3750 (I am not clear about
> this part of theory).
>
> What is your opinion?

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Tp,

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No Lawsuit Ever Fixed A Moron...