I'm about 4k into a fill of T6 on my Volvo, and I'm thinking of switching to another 5w-40 for no particular reason. I originally decided on T6 after reading these forum a lot.
That being said, here are my answers to the questions.
1. '89 Volvo 740 turbo
2. The manual says SF (ha) 5w-30 up to 68 degrees, 10w-30 from -4 to 104, and 15w-40 above 14 degrees. I've run into a lot of people with the same engine who use 15w-40 all the time, but I noticed a difference in cranking when I switched from 15w to 5w, so I'd like to stay with a 5w. The manual says 5k OCIs, but I'll probably change slightly before that.
3. Northwest Washington
4. I think I drive it slightly harder than 'normal' but I don't race or anything.
5. Most of the time, the driving is short (~10 miles), although I do drive a couple hundred miles on the highway every couple weeks.
6. Well, it used to use a fair amount of oil (1qt/1000 miles) on 5w-30 and 15-40, but since I've been using T6, it has gone down to (so far) less than a quart for 4k miles. I suspect about half of the oil loss is from a leaky camshaft seal, which is getting fixed in the next month.
I'd like to say with a synthetic because of the turbocharger (and besides that, I think all 5w-40 is syn anyways?). The O'Reilly near me has a sale on Castrol 5w-40 ($30 for 5qts and a filter), and I always see the Lubro Moly oils at Napa, but when I started to look at it, there are a lot 5w-40s out there (I counted 13 different ones I can get a stores around me). I'm not dedicated to changing from T6, if it is the best option out there.
Thanks!
That being said, here are my answers to the questions.
1. '89 Volvo 740 turbo
2. The manual says SF (ha) 5w-30 up to 68 degrees, 10w-30 from -4 to 104, and 15w-40 above 14 degrees. I've run into a lot of people with the same engine who use 15w-40 all the time, but I noticed a difference in cranking when I switched from 15w to 5w, so I'd like to stay with a 5w. The manual says 5k OCIs, but I'll probably change slightly before that.
3. Northwest Washington
4. I think I drive it slightly harder than 'normal' but I don't race or anything.
5. Most of the time, the driving is short (~10 miles), although I do drive a couple hundred miles on the highway every couple weeks.
6. Well, it used to use a fair amount of oil (1qt/1000 miles) on 5w-30 and 15-40, but since I've been using T6, it has gone down to (so far) less than a quart for 4k miles. I suspect about half of the oil loss is from a leaky camshaft seal, which is getting fixed in the next month.
I'd like to say with a synthetic because of the turbocharger (and besides that, I think all 5w-40 is syn anyways?). The O'Reilly near me has a sale on Castrol 5w-40 ($30 for 5qts and a filter), and I always see the Lubro Moly oils at Napa, but when I started to look at it, there are a lot 5w-40s out there (I counted 13 different ones I can get a stores around me). I'm not dedicated to changing from T6, if it is the best option out there.
Thanks!
