Would you rather run a synthetic blend SP oil or SN rated synthetic?
- Thread starter Whammo
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The base stock composition is much less important than the requirements for the license. API SP is more demanding in every aspect.
I'm probably use the SN synthetic assuming it's a decent brand and it carries Dexos1gen2, API SP brought up the baseline quite a bit on the low end, but that's all it only guarantees that lowest tier oils are any better, I doubt much change occurred in synthetics between the SP/GF-6A switch over especially if they were already Dexos1 Gen2, SP and GF-6a adopted standards from manufacturer specs to make the baseline spec of all oil better but synthetic oils that already far exceeded API spec and met stringent manufacturer approvals wouldn't have seen much if any improvement in the SP/GF-6A transition.
Minimum to minimum, the SP oil will be better, but without knowing what the specific oils in question are, it's hard to say relatively which would be better.
If the SP blend and SN synthetic were on my shelf and I was doing an oil change on a non-direct injection car that doesn't need a special approval, I'm going to pour in the SN synthetic on the principle of using old stock first.
If DI is a consideration, I'll use the SP blend.
If the SP blend and SN synthetic were on my shelf and I was doing an oil change on a non-direct injection car that doesn't need a special approval, I'm going to pour in the SN synthetic on the principle of using old stock first.
If DI is a consideration, I'll use the SP blend.
I bought 4-5 qt. containers of NAPA 5W30 SP semi synthetic oil when they were on sale for buy one, get one 50% off.
It's made by Ashland Oil-AKA-Valvoline, so it must be some good oil.
It's made by Ashland Oil-AKA-Valvoline, so it must be some good oil.
ideally but not what he is asking !
Look at my bag. It's empty. Can you guess what my bag is for?
I have a big stash of SN full synthetic, and I'm going to keep using it until it's depleted.
If I didn't already have this oil I'd feel comfortable going either way, just whatever was a quality product that I could obtain for the least amount of money possible. I love sales, rebates and clearances on previously expensive products.
If I didn't already have this oil I'd feel comfortable going either way, just whatever was a quality product that I could obtain for the least amount of money possible. I love sales, rebates and clearances on previously expensive products.
wemay
Site Donor 2023
SP Blend over SN Synthetic every day.
wemay
Site Donor 2023
This^
wemay
Site Donor 2023
Remember, SN Plus was only a supplement to SN which was brought forth as a placeholder until SP was ready. It only address LSPI.
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wemay
Site Donor 2023
Yes, i agree. This is a splitting hairs type subject. Like most are here.
But SP is a tougher spec when we get down to brass tacks.
On a lot of higher quality oils the only thing that changed was the label on the jug or bottle specifying it met the new SP spec.
Automakers were forced to come up with new specifications for testing for SP spec.
I'd use any quality oil with confidence. Semi-sythetic or full synthetic
Automakers were forced to come up with new specifications for testing for SP spec.
I'd use any quality oil with confidence. Semi-sythetic or full synthetic
The one thing in SP that is really of interest for my vehicles personally is Timing Chain Durability. But it seems like this is a new category, as SN and SN Plus don't seem to be rated for it. (I doubt SN/SN+ really rate a zero for timing chain durability).
It depends on how you would answer this: When SN was around did you use Synthetic SN or semi-synthetic SN.
SP over SN period.
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