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**'68OrangeSunshine** · 08-02-2020, 06:50 PM

I used a quart of Shell X-100 Oil Stabilizer along with 5 quarts of Valvoline VR1 SAE 30 on my most recent oil change on the 292. [292 is a 6 qt system with a long oil filter.] I usually try for 2500 mile intervals, but I had neglected it and gone almost 5000. Also I used a Wix 51061 oil filter -- the anti-drainback kind. Since the oil filter is high on the right side of the L6, and can drain back. On the V8 I use the 51060, since the oil filter is on the bottom of an SBC anyway.
With the X-100 the engine is a lot smoother and quieter on the freeway.

08-02-2020, 06:50 PM	#16
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,078	Re: Stp? I used a quart of Shell X-100 Oil Stabilizer along with 5 quarts of Valvoline VR1 SAE 30 on my most recent oil change on the 292. [292 is a 6 qt system with a long oil filter.] I usually try for 2500 mile intervals, but I had neglected it and gone almost 5000. Also I used a Wix 51061 oil filter -- the anti-drainback kind. Since the oil filter is high on the right side of the L6, and can drain back. On the V8 I use the 51060, since the oil filter is on the bottom of an SBC anyway. With the X-100 the engine is a lot smoother and quieter on the freeway. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.