[chrisbalich]

I'm in the throes of deep-diving and could use some anecdotal info.

1. I'm looking to pick up a spare set of spark plugs for my Rennsport trip. I have NGK BPR5EIX in the car now. The 3.1L engine makes ~10.1:1CR and I worry I'm pushing my luck. With the EFI, I can make adjustments on the fly, but I'm thinking of stepping down to 6 heat range plugs for the trip...if not permanently. Thoughts?

2. I live at sea level and fill my single-spark high-ish compression engine with 93 octane fuel. That is not available west of Kansas City. So I'm exploring octane boosters. I'm not keen to make more power. I just want to stave off detonation and engine damage on my road trip without completely redoing my timing map. Please share any experiences.

3. Oil. I typically run VR1 20w50. I'm thinking of trying the Motul Classic Performance for this trip. I'll be going 5k miles on this oil change. I like the VR1, so I'm probably not going to make a change. But it's worth discussing, so please do so.