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Yes, this has been discussed before. It seems to be generally agreed up that Shell Rotella is a good substitue for this oil? I will be using my Cub Cadet 3240 to both push snow in the winter and mow grass in the summer. Would you recommend 5W-40 or 15W-40? Would you recommend a synthetic blend...

I just picked up a Cub Cadet 3240 with a 22HP Kohler Command to use primarily to push snow. However, I want to use an oil that also be good in the summer should I choose to mow with it. It calls for 10W-30 or 10W-40 above 32* and 5W-30 or 5W-40 below 32*. I'm thinking a full synthetic 5W-40...

I have a 2014 Cadillac CTS VSport. It has the twin turbo 3.6 w/420HP. I'm currently running PP 5W-30. Would you recommend anything different, and what kind of intervals? I've been going by the OLM.

With the disappearance of GC 0w-30, I'm looking for a replacement. My '01 GMC Sieara has a built 6.0 making about 500 crank HP. I only drive it about 2,000-4,000/year and change oil once/year. What would you recommend? Castrol Edge 0w-40 M1 5w-30 EP Castrol Edge 5w-30 EP Something else

I just build and installed a new 6.0L in my 2001 GMC Sierra 4x4. I built it with 11:1 compression and about 500HP at the crank. I broke it in with Rotella dino 10w-40 plus a break-in additive. I've changed the oil at the following mileages. 10, 100, 500, and 1500. I now have about 3300 miles on...

I've been running Amsoil 5W-30 in my '99 Buick Regal for the past several of years. This car has the supercharged 3800 and has been mildly modified. It was custom street tuned and runs perfect at all RPMs. The car sees almost 100% interstate driving and very little full throttle use. I currently...

I've got a fairly modified 5.3 in my '01 GMC Sierra 4x4. It's cammed among other mods and custom tuned. The truck has 70K miles on it and runs great. I only drive the truck about 5000 mile/year, all onroad driving. The last two years I have run GC 0W-30. What I don't like is that I'm burning a...

Can the new Stihl HP Ultra full synthetic oil be used in a Yamaha Banshee which has a high-revving, 350cc, twin-cylinder, liquid-cooled, two-stroke engine? I've been looking for technical data to answer this question but am coming up short. I know you don't want to use a TW-C3 oil in a chainsaw...

For those of you that doubt that the regular old retail stuff is used in high dollar sponsored race cars, here's some pretty substantial proof. M1 0W-40, right out of the bottle. These pics were taken last Thursday during a practice session. Cropped from this photo. The rest of the...

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I've got the tranny out of my '01 GMC Sierra putting a new torque converter in it. Would you refill with Dexron VI at $5/qt or not. If not, should I just refill with Dexron III or go with M1 ATF?

This post is related to the start-up knock in my '01 Sierra 5.3. Which of the following oils would be the most pumpable at low temps? I've not yet schooled myself in reading the product data sheets. Not sure what I'm looking at. 1. M1 EP 5w-30 2. GC 0w-30 3. Amsoil 5w-30 4. Amsoil S3K 0w-30

I have a '01 GMC Sierra with a 5.3. It only has 5x,000 miles on it and runs great. Here's my question. When I start it cold, it's quiet for a few seconds and then it begins to knock. It's a metallic knock, directly variable with engine RPMs. Within 60 seconds or less it's gone and will not...

I just bought a '07 Buick Terraza. Anyone know if it would have the new Dexron VI, or are they still using Dexron III in some apps?

I just bought a '07 Buick Terraza. It has the 3.9L V6. I'm not sure if this is a brand new engine or if it's an over-bore of an existing one. I've got 400 miles on it and am contemplating my break-in process. You know what the dealer says, drive it and forget it, but that's not me. How many...

I've got a '01 GMC Sierra 4x4. It has a 5.3L with a moderate cam and a tune. It shifts at 5900 RPMs. The truck is only driven about 4K-5K miles/year. I change the oil once/year and use Wix oil filters. The current fill is M1 5w-30 EP. What oil will give me the best protection? I am an Amsoil...

Where can I buy Dexron-VI in Ohio, besides the dealer?

I have a '99 Regal GS with the SC 3800 engine. I put AutoRx in the tranny about 2500 miles ago. It's ready to be flushed. I'd like to go with synthetic tranny fluid. Can I do that now or do I have to rinse with conventional tranny fluid? The AutoRx instructions for trannys says nothing about this.

I'm getting ready to change the oil in my GM 4x4 with a 5.3 in it. Which of the following oils would you recommend? Amsoil S2K 0W-30, Amsoil S3K 5W-30, or Mobil 1 EP 5W-30? I'm a Amsoil preferred customer and cost on the two Amsoils is almost identical. This truck sits in the garage most of the...

Our church has an old Ford 8N that we have had restored and runs great, and doesn't smoke. I'm wondering if straight 30W oil is still the preferred oil to be used in this engine. I'm wondering, with the advancement of oil technology, if a multi-grade oil would provide better start-up protection...