When driving consistently for 20+ miles then slow down:
What happens is the car shudders a little bit (ticks, ta-tick, clicks a few times, sometimes once, sometimes up to 6 clicks/ticks) loses power even though we apply the accelerator and seems to stall when we slow down
Also noticing for the last 3 months an unusual rapid decrease in oil level.
Pulled spark plugs from Chevy Spark (~40000miles)
From left to right. 1,2,3,4.
1. Has no residue, gap of 33/1000
2. Has no residue, gap of 33/1000
3. Has some residue on ground, build up on electrode, gap of 31/1000
4. Has a lot of residue on