Oil Filter

Realistically, at operating temp there is *no* difference. Both a 5W-30 and a 10W-30 will test out around 11-13 cSt @ 100 C. Any xW-30 will test out about the same at operating temp: 0W-30, 5W-30, 10W-30, and 30.

Cooler temps are where the dramatic differences show up. I'm sure even in West Palm Beach, you must get some days in the 30's or 40's? There will be a slight difference in fuel economy, say 2%.

At the other extreme, I live in a climate that in winter is usually *too* cold for a 5W-30. A regular 5W-30 is only "safe" to -30 C or -22 F. I usually use a 0W-30 synthetic in winter to have that extra margin on cold days.

This winter, I'm trying Mobil 1 0W-20 as a "winter" oil, though so far our winter has been unusually mild, with temps of 0-32 F. No -40 weather yet. Compared to similar conditions early last winter, I've gained about 5% in city driving, no difference on the highway.

I tried running Mobil 1 0W-30 in summer and had no difference whatsoever in fuel economy, even city fuel economy.

 

Probably to cover as many bases as possible. A 5W-30 will meet the driving needs of the vast majority of the driving public. At -40, you had better run a 0W-30, and at the opposite extreme perhaps thicker. Is your owner manual the same as for my 2004, stating a 10W-30 is allowed but a 5W-30 is "preferred?"

I thought Honda recommended a 5W-20 in most of their models?

 

I purchased case (10) oil filters for a real cheap price. (At least I think so.) The boxes and filters are marked Genuine Toyota parts with the Toyota trade mark and Denso 90915-YZZF2 made in Thailand. Also something I have never seen before is that the gasket is covered in cellophane and they appear to be pre-lubricated. Are they any good?
Kathleen