Question 1

Does this Oil suitable for 1999 chevy silverado 2500 186000 miles?

Accepted Answer

I have been using full synthetic oil in my 98 Silverado 5.7. I now have 364k miles with no engine issues at all. I'd recommend it for anything that takes 5w30

Question 2

Does the Castro 5w-50 SPT meet the Ford spec  WSS-M2C931-B for the GT 500?

Accepted Answer

Castol says it meets the spec, and Ford SVT has approved Castrol 5W50 for use in the GT500. I use this oil in my 2013 GT500.

Question 3

is current product dexos 1 approved. I see it on the quart, but not on the 5 quart and wondering if it is an old picture

Accepted Answer

"Approved - GMdexos1™ supersedes GM-LL-A-025, GM6094M and GM4718M"  This is indicated on the 5W-30 Castrol Edge High Mileage data sheet, dated 09Nov15.  On their latest data sheet dated 20Sep17, this approved statement is no longer indicated.  1 quart size or 5 quart size makes no difference.  If the product was made after 20Sep17 then it is not likely to be approved for engines requiring dexos1.  I would safely assume the bottle labeling will reflect whether or not using this as a suitable substitute over dexos1 type oil is acceptable.  The picture is old and will, or should, be changed so their is no confusion.

Question 4

I ordered this and it came with the letters SAE in front of the 5w-30, does it matter?

Accepted Answer

SAE refers to the grading system. There are actually thicker Euro 5w-30 oils, but this is a thin 5w-30 for American and Asian cars. This particular blend is the latest additive formulation for GDI / turbo engines, it should be one of the best products on the market.

ASIN	B01CRYHNI8
Best Sellers Rank	#35,718 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #168 in Engine Oils for Cars
Brand Name	Castrol
Compatible with Vehicle Type	Car
Container Type	Jug
Customer Reviews	4.8 4.8 out of 5 stars (5,446)
Global Trade Identification Number	00079191231289
Item Type Name	Motor Oils
Item Weight	0.01 Ounces
Liquid Volume	160 Fluid Ounces
Manufacturer	Castrol
Manufacturer Part Number	15906E
Model	03128C
Number of Packs	1
SAE J300 Viscosity Grade	5W-30
Size	5 Quarts
UPC	079191231289
Unit Count	160.0 Milliliters
Viscosity Level	Low to Medium

Castrol 03128C Edge High Mileage Black ILSAC GF-5, API SN, ACEA A1/A5, ACEA B1/B5 5W30 Synthetic Motor Oil, 5 Quart

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