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Originally Posted By: slacktide_bitog Use the cheapest 5w30 on sale and run it to the OLM-suggested OCI Is Napa synthetic on sale in Canada? Down here, it's only $2.99/qt. Most synthetics, and some blends, meet dexos standards. Napa Synthetic does go on sale. Currently, the price is...

Originally Posted By: JC1 What about shipping costs? I didn't inquire about that. I think they are more accustomed to bulk orders so shipping would be included, perhaps? I'll check with the sales rep.

I recently came across this company, Big Red Oil Products (http://bigredoil.ca/), when trying to find better motor oil prices. I thought at first they only sell in bulk, but it turns out they also sell in cases of 12 x 1 quarts and 3 x 5L jugs. They apparently have their own semi-synthetic and...

Originally Posted By: Falcon_LS That said, I personally run full synthetic in mine and do a simple drain and refill at the 50% mark and change out the filter when I change the oil at 1% or so. It's anywhere between 16,000 - ~18,700 km for the OLM to hit 1%. Wow - I haven't heard of that...

Originally Posted By: BrianF I have run synthetic since I bought my 06 TB with 25,000km on the clock. I was doing 10,000km oil changes until I started on this site. My oil life monitor gongs me at 16,000km intervals. I surmised that if the OLM is set up for conventional oil, running synthetic...

Originally Posted By: beanoil The oil pressure sensor is a known failure item, indicating no pressure at idle when there is. Don't put much faith in the oil pressure gauge, it is at the end of a line of conversions from the ECM, and is not accurate. I was just reading about this on some other...

Originally Posted By: JC1 Where are you located in Canada? Synthetic is always good up here. I'm using Pennzoil Platinum myself and it's a very good oil (Esp when it's on sale). 5w-30 would probably be the best for your truck. Does the truck burn any oil? How many kms do you drive in a year...

Hello, I recently purchased my 2006 GMC Envoy 4.2L I-6 about a year ago (used obviously). At that time, it had ~129,000km on it and I had an oil change done at the GM dealer. I want to start doing my own work on the car, and I've been getting some really conflicting advice about oil changes...