Myswitch to synthetic oil: first 1000 miles

[circuitsmith]

For this winter I put Mobil 1 0W-30 + OEM filter.Hoping for easier starts and better mileage on short trips where the engine barely gets fully warmed up.Normally I put in whatever major brand (Castrol, Penzoil, Havoline) 5W-30 is on sale.Car is a 2006 Matrix 5-speed with 29,000 miles.Driven mostly short trips 2-3 times a week, plus road trips.Sometimes I skip filter changes when the miles are really low, never more than 6000 miles on a filter.M1 oil has now been in 1000 miles over 13 weeks.Over 5 fillups MPG has improved maybe 0.5MPG; ranged 26-28.5.Engine previously consumed no measurable amount of oil over 6 months and 1500-4000 miles.I check the dipstick every 1000 miles.In this 1st 1000 miles it has used 1 cup, topped off.Oil looks a little darker than previous. Some dino residue getting cleaned off?

[Bedlam]

M1 will dirty up quick, but don't worry. It keeps its lubrication ability for the duration. I've turned fresh oil nearly black after a track day and sent in a sample for analysis. was still good to go for a full duration change.I use the 0-30 M1 during winter as well in the Vibe. 0-40 for the other ride. does really well on those zero degree F days.

[beemerphile1]

Quote, originally posted by circuitsmith »...M1 oil has now been in 1000 miles over 13 weeks...Do you only drive 4,000 miles per year? If that was all I drove, MPG wouldn't be a concern.

[circuitsmith]

Quote, originally posted by beemerphile1 »Do you only drive 4,000 miles per year? If that was all I drove, MPG wouldn't be a concern.3-6000 miles per year, depends on road trips.I ride a bike to work.No, MPG is not a "concern" for me, but I'm still curious what MPG difference 0W oil will make.