May depend on the grade of Maxlife used. The flash point on the 5w30 is not impressive (about 220C), better on 10w30 (230C), but great on the 10w40 (242C). I suspect the 5w30 will consume, but the 10w40 is doing nicely in my pickup (not that it was a heavy consumer, but I have not had to add any in 2400 miles). Also, what oil were you using before?
oils that suck
- Thread starter moontan
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Valvoline MaxLife ran great in my previous car but it DID NOT stop an oil seal leak. Auto-RX seemed to stop the oil seal leak.
I don't think there are any major brand motor oils that are completely bad. Some say that Valvoline is weak compared to other conventional motor oils but with 3000 mile oil changes Valvoline would probably do fine.
But I prefer Chevron or Castrol for conventional motor oil.
I don't think there are any major brand motor oils that are completely bad. Some say that Valvoline is weak compared to other conventional motor oils but with 3000 mile oil changes Valvoline would probably do fine.
But I prefer Chevron or Castrol for conventional motor oil.
I never noticed any oil burn off in the 99 bonneville I change the oil on (then again, I never checked closely). In the last 4k of 10w-30 Max Life a quart has magically disappeared. So I added another quart to the car and since the oil looks and smells clean it should last fine for another thousand till I can change it.
All I can say is, in its place is going Delvac 1300
All I can say is, in its place is going Delvac 1300
I switched from Castrol to the Drive Clean blend in my girlfriend's car, and oil consumtion was reduced! It doesn't use nearly as much oil as it used to.
Goes to show no 2 vehicles are the same.
Kind of like a snowflake but vehicles don't melt.
Dr. T:
It sounds like a "slippery slope" wrt engine deposits. By the time you notice a problem, it's usually too late to fix.
I agree in that case, a much heavier viscosity may cause problems with lost power and mpg. Though the motor is already suffereing lost power and mpg.
Sort of like how somebody puts +200,000km on an automatic transmission with zero servicing. They suddenly decide to service it and all the trash gets knocked loose. The transmission ends up needing an overhaul.
I have found with a good quality synthetic or good HDEO of the proper viscosity, I never have the engine deposits to worry about.
My 1984 Ford F-150 with 528,000km on it should be proof. The valvetrain and valvecovers are spotless. That was by running Mobil Delvac 1 5W-40 from new, OCI every year or two.
Jerry
Hhmmmm . I guess I'm a bit lost in the time line of the Mobil Delvac 1 Synthetic that you have used since new " 1984 "....... I did not think they made it in 1984 or 1994 for that matter .
I learn something every day here at BITOG
Wow if memory serves me right thats 330,000 miles. May i ask which engine you have in your F-150?? I have a 351W in my Ford E150 running a Motorguard and currently 0W-30 Amsoil. Wondering if I would get better protection with the Delvac 1 5W-40 stuff. I have a Motor Guard bypass and Amsoil FF filter. OCI was every 3k before i got the bypass.
I first became aware of Mobil Delvac 1 in 1978: my Uncle used to be a mechanic at the local school board and they took part in a field trial running Delvac 1. Excellent results.quote:
Originally posted by Motorbike:
Hhmmmm . I guess I'm a bit lost in the time line of the Mobil Delvac 1 Synthetic that you have used since new " 1984 "....... I did not think they made it in 1984 or 1994 for that matter .
I learn something every day here at BITOG
I also have a dusty cardboard box full of Esso product data sheets. I'll read from A Lubrication Guide For Canadian Fleets: Under The Hood (1983)P.8:
"Delvac 1: In many parts of Canada its low temperature capability alone makes Delvac 1 worth the extra cost. Not only will this 5W-40 oil get you on your way at 40 below, it also behaves admirably at very high temperatures. Because Delvac 1 is fully synthetic ..."
You get the idea.
Jerry
I have the 302 V8 and C6 auto. I broke in the motor as follows:
1,000km: changed to regular 10W-30
3,000km: changed again to regular 10W-30
5,000km: changed to Mobil Delvac 1
Although I would change the oil filter twice a year, sometimes every 3 months in winter, the oil only got changed every year or two.
With the CI-4 reformulation, Delvac 1 is quite a bit thicker at low temps. I wish I had stocked up on the old stuff, it's perfect for an older vehicle.
I'm sure Amsoil will work very well for you to. It's very important to properly break-in a motor (Don't drive gently, work the thing)and switch very early, before all the deposits form.
The 302 isn't exactly a stellar motor to begin with. Many around here are sludged up after 3-4 years. The cold climate kills everything.
Jerry
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