Here is what I do for my long term indoor winter storage (6-7 months) for my cars in western new york.
Right before I put them in storage, I change the oil over to a 10w40 rotella T or mobil delvac motor oil, with a cheapie decent filter (usually supertech), and I drive the car one last time for about an hour, then park it and let it sit inside under the cover for 6-7 months.
The diesel oil has a strong additive pack and its great for longterm storage.
When spring comes the first thing I do is start the car, and dump the good diesel oil into a clean container and put it in my tractors and lawn equipment, and I go back to my synthetic oil and OEM filters.
Also, I remove the battery and leave it inside the house in the basement where it is warmer than the cold garage.
Another thing I do is get 4 mini spares, and let the car sit on them during storage, because you will flatspot your expensive pirelli's and that will tick you off in the springtime...
) I will have about 6,000km on the oil. The car is a 2004 Honda S2000. It will be driven hard, with many trips to 8200rpm but none of it at the track this year, street driving and basic commuting only. Should I store the car with this oil in the engine or dump it before the winter, put in some fresh Redline and then use that oil next spring/summer?
