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popularPhoTheNguyen85 posted Yesterday 04:36 PM
popularPhoTheNguyen85 posted Yesterday 04:36 PM

YMMV: Castrol GTX High Mileage Synthetic Blend 5 Quart in various grade $14.95

$15

$30

50% off
Advance Auto Parts
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Local Advance Auto Parts have various grade Castrol GTX High Mileage Synthetic Blend on clearance for $14.95. On top of that, there is a rebate for $5 back via PayPal or Venmo essentially making a 5 quart $10. Limit 3 rebate.

https://www.castrol.com/en_us/uni...tions.html

https://shop.advanceautoparts.com...hicle=true
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About the Poster
Local Advance Auto Parts have various grade Castrol GTX High Mileage Synthetic Blend on clearance for $14.95. On top of that, there is a rebate for $5 back via PayPal or Venmo essentially making a 5 quart $10. Limit 3 rebate.

https://www.castrol.com/en_us/uni...tions.html

https://shop.advanceautoparts.com...hicle=true

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Yesterday 08:42 PM
222 Posts
Joined Mar 2015
fandrew7Yesterday 08:42 PM
222 Posts
This is a good deal, but various weights are available on Amazon for this same price. For the five dollar rebate savings I'd rather not have to deal with advanced autos incredibly inaccurate inventory and the gas to go get it.
Yesterday 08:55 PM
3,839 Posts
Joined Oct 2010
brotherhpj41Yesterday 08:55 PM
3,839 Posts
Always wondered:
Synthetic blend motor oil generally contains between 10% and 25% synthetic base oil mixed with conventional oil, though some blends may vary from as little as 1% to as high as 60%. There is no industry-wide standard defining the exact percentage required, allowing manufacturers to decide the ratio, often keeping it closer to the lower end for cost reasons
Yesterday 11:33 PM
222 Posts
Joined Mar 2015
fandrew7Yesterday 11:33 PM
222 Posts
Quote from brotherhpj41 :
Always wondered:
Synthetic blend motor oil generally contains between 10% and 25% synthetic base oil mixed with conventional oil, though some blends may vary from as little as 1% to as high as 60%. There is no industry-wide standard defining the exact percentage required, allowing manufacturers to decide the ratio, often keeping it closer to the lower end for cost reasons
While full synthetic is a better option on any engine that doesn't have leaky seals, semi synthetic will often leak less than full synthetic if you have old or dry seals. Conventional will leak even less. It's not uncommon for an older engine like Jeep's 4.0 to visibly drip full synthetic but be completely dry with conventional oils. Every engine is different and the type of oil (which detergent packs are used in the blend) matters. If you have a small leak/drip try switching to something like white bottle Castrol (conventional) or a semi-synthetic like gtx high mileage if you need the thinner viscosity.
Source: mechanic for ~25 years

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