Just yesterday old blue turned over 130,000. While not bad for a 19 year old car, she's starting to show her age. While the manual likely states a tune-up ever 36,000 miles, I only waited 10,000-15,000 this time around. As the engine is going through about 1+ quart every 1,000 miles, so the spark plugs start getting fouled out, and the engine starts idling a bit rough. While it wasn't bad, I figured I'd change the plugs when I hit 130,000 miles. The plugs weren't as bad as I expected, and I'm skeptical that the oil consumption is more valve guide related than piston ring/cylinder wear. Makes me ponder whether or not I should purchase a set of AFR heads to see whether it fixes the problem...and pick up a good 80 hp in the process.