My results with SSO (&quest for max mpg)thus far, as posted on another forum:
Originally Posted By: yota4me2;1355900
05 Toyota Tacoma V6, AT, 4x4, access cab:
Since the weather warmed up, I've been getting 21.6--22 mpg (EPA sticker said 17--21 mpg) with alot of cold start 7 mile trips & apprx. 50/50 city highway driving, flat terrain, using Shell 87 octane (owners manual recommends 91+ octane for best performance/fuel economy), 245/75/16 Michelin LTX A/S tires. Warm up time is apprx. 5-10 seconds. I gradually accelerate to 45-50 mph til normal operating temp, then 60 mph max. I coast (simply let off the gas) as much as possibe/gradually decelerate when approaching stops/turns. Basically gradually accelerating & decelerating. I don't know what my highway mileage would be now--23-24? This is the best mpg I've gotten for this type driving (50/50 city/highway) during the 15 months I've been driving the truck. I guess my results are a combination of truck getting broken in, driving style, summer blend gas/and/or warm weather, stock size (low rolling resistance?) tires, flat terrain, synthetic oil?, topper. Going to start trying some Lube Control FP60 & Lucas Upper Cylinder Lubricant for mpg increase.
UPDATE: Above was as of sometime in May, 2006. Since then, I've been using Lucas UCL (1 oz per 5 gal of gas), the weather has gotten warmer, and I've limited my top speed to 55 mph. I've also replaced oil in front & rear differentials with synthetic oil. I've been getting around 22.6--23.2 mpg. The 23.2 mpg was probably closer to 65--70% highway miles. I assume my 100% highway mpg would be around 24 mpg using the 87 octane with Lucas UCL and around 25 mpg with Shell 93 octane & Lucas UCL. Might try some E3 spark plugs for more mpg.
http://www.e3sparkplugs.com/
Maybe those would put me close to 26 mpg (or close to 25 mpg the way I'm currently driving) for 100% highway mpg with Shell 93 octane & Lucas UCL??????
UPDATE:
23.826 mpg combined city/highway--average of apprx 1/4 tank using Amsoil 5W-30 (ASL) + 3 oz Auto-RX & apprx 1/2 tank using Amsoil 0W-30 (SSO)+ 3 oz Auto-RX. Amsoil lubricants throughout except power steering fluid. Using Shell 87 octane & FP60. Tires inflated to 35 psi cold.
With Shell 93 octane, I'd expect around 24.5 mpg combined---not bad for a truck with EPA rating of 18 mpg combined.