Valveoline Maxlife (SYN BLEND) 10w30!! so far so good, past 5 oil changes now, b4 that was mobil 1 5w-30 since 40k now about 78k

 

Amsoil synthetic 10W40......80,000 on the clock

 

Mobil 1 10W30 year round

 

15w 50 Mobile 1 synthetic, I have 100175 miles on the odometer.
no metal shavings in the oil yet <knock on wood>

 

I use Mobil 1 10/30 all year with an AC/Delco filter. 108k miles on the clock. Only have a slight rear main leak, no big deal. Fixed intake leak at around 95k.

Seems that Mobil 1 rules the roost here!!

 

Wow, that oil really thins out when it heats up. Reverse viscosity!

 

I have 105K on my '93 and use mobil 1 5w30. Doesnt loose any oil at all. mobil 1 is the way to go.

I have also used valvoline synthetic and like that one just as much.

 

Mobil 1 10w 30w at 80k know been unsing it ever since i bought her with 31K, no leaks ( except intake, go figure ) and doesn't burn any. I change it every 5000 too.

 

just hit 85k on mine and I use 15-30 mobil 1

 

I run Quaker State semi synthetic 10w-30, I dont buy in the the Mobil 1 frenzy. From tests I've seen it is somewhere around .05% better in bearing swear scar tests than my $2.25qt stuff.

Quaker State has a good rep and puts out good numbers in ash content, flash point etc

 

120,XXX miles mobile 1 15-50 summer 5-30 winter

 

91,800k using Royal Purple 10w30 and K&N filter.

 

Castrol GTX 5-30 year round.

 

Valvoline Max Life 5w-30 w/ 85k on the clock.

 

120,000 on 97. Mobil 1 Syn 10w-30 all year.