Semi-Synthetic Oil?

[HappyMommy 4]

Just called to setup an appointment for Creeper's first oil change at the dealer. I had wanted to go to someplace like Valvoline or Jiffy Lube but no one (still) has the oil filters in stock for the Spark yet so off to the dealer I go. While I was setting up the appointment I asked about how much the oil change would be. I mentioned that I assumed it wasn't too bad since it's just conventional oil vs. synthetic (used to drive a MINI Cooper so I am all too used to synthetic oil change prices). His response was that actually the Spark takes a "Semi-Synthetic" oil, not conventional. This is a new one on me. Not sure I've ever heard of that before. I assume that's their way of saying "blend?"

Edited November 25, 2013 by HappyMommy

[tommyspark 24]

Semi synthetic is half conventional n half synthetic. But I think he was wrong because dexos approved 5w20 only comes full synthetic. As far as I know anyway.....

[psquare75 35]

The GM oil is a blend, but most of the 'approved' stuff is full.

[Chevrolet Customer Care 25]

You can find the GM recommended Fluids chart on page 11-12 of your manual.

"Use only engine oil licensed to the dexos1 specfication, or equivalent, of

the proper SAE viscosity grade. ACDelco dexos1 Synthetic Blend is

recommended. See Engine Oil on page 10‑7."

Jackie

Chevrolet Customer Care

[HappyMommy 4]

This is way over my head. I knew there were conventional, synthetic and blends and that they came in different viscosities but had no idea of this dexos1 specification stuff. Thinking even though I liked the idea of us doing the oil ourselves (once/if we can find the filters at the local auto parts store) I will still take it up to the dealer... I don't wanna have to even think that hard about it.

[austex04 48]

The oil life monitors in GM vehicles are calibrated for full synthetic and synthetic blend oils, hence the requirements for Dexos approved oils (and also a money maker for GM). Those quick lube places are known to use poor quality, generic oil filters that can fail internally and cause problems. DIY with genuine filters, or let a competent dealer do it. After poor dealership experiences, and the cost of full synthetic oil, I do all maintenance at home except for tire maintenance. Ramps make oil changes very easy, and you save $ in the long run.

[psquare75 35]

The cynic in me says Dexos = Money paid to GM by oil companies so they can put a stamp on their already just fine synthetic oils.

FWIW Most of those chains will allow you to bring your own oil and filter.