Motor burns oil
#1
Junior Member
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Join Date: Nov 2004
Posts: 7
Motor burns oil
Hi,
I just built a new big BBC 622, and it is in a street car. The block was cross hatched honed with 400 grit. The motor is a 4 3/4 stroke with 6.700 inch rod. I am running total seal gapless top ring. The rings are 1/16, 1/16, 3/16. After I broke the engine in I put in valvoline racing oil 20/50 . I have a couple 100 miles on the motor and it seems like it burns maybe 1/2 qt per 30 to 40 gallons of gas. This is my first big inch motor. Is this normal for a motor this size? or did I over look something?
Thanks
I just built a new big BBC 622, and it is in a street car. The block was cross hatched honed with 400 grit. The motor is a 4 3/4 stroke with 6.700 inch rod. I am running total seal gapless top ring. The rings are 1/16, 1/16, 3/16. After I broke the engine in I put in valvoline racing oil 20/50 . I have a couple 100 miles on the motor and it seems like it burns maybe 1/2 qt per 30 to 40 gallons of gas. This is my first big inch motor. Is this normal for a motor this size? or did I over look something?
Thanks
#4
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Join Date: May 2010
Posts: 7
Re: Motor burns oil
Originally Posted by davelee
Hi,
I just built a new big BBC 622, and it is in a street car. The block was cross hatched honed with 400 grit. The motor is a 4 3/4 stroke with 6.700 inch rod. I am running total seal gapless top ring. The rings are 1/16, 1/16, 3/16. After I broke the engine in I put in valvoline racing oil 20/50 . I have a couple 100 miles on the motor and it seems like it burns maybe 1/2 qt per 30 to 40 gallons of gas. This is my first big inch motor. Is this normal for a motor this size? or did I over look something?
Thanks
I just built a new big BBC 622, and it is in a street car. The block was cross hatched honed with 400 grit. The motor is a 4 3/4 stroke with 6.700 inch rod. I am running total seal gapless top ring. The rings are 1/16, 1/16, 3/16. After I broke the engine in I put in valvoline racing oil 20/50 . I have a couple 100 miles on the motor and it seems like it burns maybe 1/2 qt per 30 to 40 gallons of gas. This is my first big inch motor. Is this normal for a motor this size? or did I over look something?
Thanks
#6
Originally Posted by oldandtired
Do you have the low tension oil ring package?
And I wouldn't run 20/50. The thicker oil with low tension rings will make it burn oil worse. I used 10/30.