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Is that the HM formula? I thought of that, too. Winters in eastern Washington get cold, but not cold enough for a zero W, and summers can, and usually do hit 100+. Would a 5w40 work for a year round fill? As far as "swill" that was not meant as derogatory...more of slang. I am not brand loyal...

So far, there are no issues with leaks, but after seeing the UOA, I'm leaning towards the HM formulation to help with the viscosity and the fuel dilution. This is my first time with the 3.6L, but it seems pretty good. FWIW, the magnet had the usual amount of gunk on it...nothing really to make...

Aluminum avg = 4 Iron = 17 Copper = 5 Moly = 94 Everything else was good.

First UOA on my truck. I drive a fairly short (10 mile) highway commute during the week. Some city street driving. No real idling or mountain driving. Thoughts? Should I switch to a high mileage oil? When the AC/Delco swill was drained, I went to the Costco Kirkland synthetic. OLM was at 4%...

I've been running M1 AFE 0-20 and either M1 filter or Fram Tough Guard filters on my CX-5. No issues at all. Recently switched to Penn Platinum, and it seems to like that, too. Wix filters have been used on my other vehicles without any problems at all.

Originally Posted by PimTac I am running the Havoline Pro DS by Chevron. At $19.97 for a 6 quart box it's a great deal and a great oil. I've also used Valvoline. My oci is every 5000 miles. PimTac, how does your '17 like that Havoline? I'm using M1 AFE 0w-20 in my '16, but going with annual...

RVW: I never said I lay two strips of rubber from stoplight to stoplight. Nor did I say I exceed posted speed limits. I don't sit in my driveway and idle for ten minutes. And when I did my UOA after one calendar year, my OLM was at 10%. East coast dealerships must charge less than those out...

I did notice today as I was browsing through the Wal-Mart oil section that Valvoline has a synthetic 5w40 that is Dexos2 certified. Anybody have any thoughts on that?

Originally Posted by mightymousetech You say you drive "spirited", but only 4-6 miles? You have to drive gently till the oil is warmed up, If I did that, I might as well go back to driving a 4 cyl Hyundai. Thanks, but no thanks! LOL

Originally Posted by Triple_Se7en Only switcheroo I would make is straight 0W40 Castrol from April to November, but add a little thinner oil for November to April. In my Colorado, I'm using 0W40 Castrol Edge currently. But I bought two quarts of Mobil-1 0W20 to use in the winter months. For my...

Originally Posted by GumbyJarvis Is there a Pepboys around? They always have coupons online, usually its Pennzoil or Quaker State and a Champion Filter. Nope, no Pepboys close to me.

Originally Posted by Mad_Hatter For the price of one UOA you can just about take it in to Valvoline and get it changed a second time in a year. Changing out your oil more frequently, not less, is the best defense for fuel dilution and short tripping IMO. Any good Valvoline 5w30 should do you for...

Benny, you run 5w20 year round? I would have thought that 5.7 would take 5w30.

Hey all, looking for advice on oil for my 2011 Sierra with the 5.3L V8. I have just over 60K miles on the odometer. It does mostly 6 mile one way side street commutes to work. So about 4K miles per year. No towing or hauling. In the summer I ride, so it sees less time on the road. When I do...

Originally Posted by dave1251 There is not enough data to determine the short trips are the only cause of fuel dilution. When was the last time a fuel system cleaner used if at all? Dave, I have not used a fuel system cleaner for this truck. I have, however, tried to use only higher quality...

So it sounds like two options: either go with a 5w-40 and stick with a one year OCI, or switch to a conventional and start changing twice a year. Pros/cons of each?

And pardon me for being so naive, but what would the bump up to a 5w40 do?

77GP, for only six months and roughly 2k miles, would a conventional oil work?

I can't speak for the previous owner, but I do not tow anything. 77GP, I do have a short daily commute (6 miles), but it only sits for the weekend if I'm not getting stuff from Home Depot or the landscape store.

Hi folks. This is my UOA for my 2011 Sierra, with 59K on the odometer. One year OCI, w/ 4049 miles on the oil. The high aluminum/iron/copper has me concerned. Any thoughts? Should I change oil brand/type or filter?