Post your latest oil change

Messages
30
Location
United States
2008 Pontiac Grand Prix, 3.8L ("the 3800") non-supercharged, 170,148 miles on car Out: Mix of Castrol Conventional and Mobil Super HM 10w-30, Purolator PL10111 Oil filter In: 4.5 Quarts Delo XLE 400 10w-30 Synthetic Blend (CK-4/SN), ACDelco PF47E The Series III 3800 is spec'ed for 5w-30, but I like running 10w-30 (spec for Series II) during the warmer months. This car consumes about 1 quart every 1,000 miles (bad piston rings). Other than the oil consumption, the car is great. I'm sure there will be little to no difference in consumption, but for [censored] and giggles I decided to throw in diesel oil which I found on sale and also happened to be dual rated CK-4/SN. I plan on leaving this fill in until November/early December, which will probably be somewhere around 7k-10k miles. Any input appreciated.
 
Messages
551
Location
Qu�bec
Originally Posted by MontePrix28
2008 Pontiac Grand Prix, 3.8L ("the 3800") non-supercharged, 170,148 miles on car Out: Mix of Castrol Conventional and Mobil Super HM 10w-30, Purolator PL10111 Oil filter In: 4.5 Quarts Delo XLE 400 10w-30 Synthetic Blend (CK-4/SN), ACDelco PF47E The Series III 3800 is spec'ed for 5w-30, but I like running 10w-30 (spec for Series II) during the warmer months. This car consumes about 1 quart every 1,000 miles (bad piston rings). Other than the oil consumption, the car is great. I'm sure there will be little to no difference in consumption, but for [censored] and giggles I decided to throw in diesel oil which I found on sale and also happened to be dual rated CK-4/SN. I plan on leaving this fill in until November/early December, which will probably be somewhere around 7k-10k miles. Any input appreciated.
Scuse my ignorance but why running a 10w30 when its hot and not a 5w30 all year long ? a 30 is a 30 isnt ?
 
Messages
1,776
Location
Kingston
Originally Posted by Baveux
Originally Posted by MontePrix28
2008 Pontiac Grand Prix, 3.8L ("the 3800") non-supercharged, 170,148 miles on car Out: Mix of Castrol Conventional and Mobil Super HM 10w-30, Purolator PL10111 Oil filter In: 4.5 Quarts Delo XLE 400 10w-30 Synthetic Blend (CK-4/SN), ACDelco PF47E The Series III 3800 is spec'ed for 5w-30, but I like running 10w-30 (spec for Series II) during the warmer months. This car consumes about 1 quart every 1,000 miles (bad piston rings). Other than the oil consumption, the car is great. I'm sure there will be little to no difference in consumption, but for [censored] and giggles I decided to throw in diesel oil which I found on sale and also happened to be dual rated CK-4/SN. I plan on leaving this fill in until November/early December, which will probably be somewhere around 7k-10k miles. Any input appreciated.
Scuse my ignorance but why running a 10w30 when its hot and not a 5w30 all year long ? a 30 is a 30 isnt ?
Especially in a conventional the 10w30 has much less viscosity index improvers which can make it a more stout oil apparently. This is even true with synthetics in a lot of cases which I used to be unaware of. I've recently switched to 10w30 in my old engines because of this.
 
Messages
30
Location
United States
Originally Posted by caprice_2nv
Originally Posted by Baveux
Originally Posted by MontePrix28
2008 Pontiac Grand Prix, 3.8L ("the 3800") non-supercharged, 170,148 miles on car Out: Mix of Castrol Conventional and Mobil Super HM 10w-30, Purolator PL10111 Oil filter In: 4.5 Quarts Delo XLE 400 10w-30 Synthetic Blend (CK-4/SN), ACDelco PF47E The Series III 3800 is spec'ed for 5w-30, but I like running 10w-30 (spec for Series II) during the warmer months. This car consumes about 1 quart every 1,000 miles (bad piston rings). Other than the oil consumption, the car is great. I'm sure there will be little to no difference in consumption, but for [censored] and giggles I decided to throw in diesel oil which I found on sale and also happened to be dual rated CK-4/SN. I plan on leaving this fill in until November/early December, which will probably be somewhere around 7k-10k miles. Any input appreciated.
Scuse my ignorance but why running a 10w30 when its hot and not a 5w30 all year long ? a 30 is a 30 isnt ?
Especially in a conventional the 10w30 has much less viscosity index improvers which can make it a more stout oil apparently. This is even true with synthetics in a lot of cases which I used to be unaware of. I've recently switched to 10w30 in my old engines because of this.
I run the 10wt in the summer because I am unsure when the blowby occurs (when it's cold or hot or maybe even both, which I assume) so the 10W, even if it's not 0 degrees out, will be a tad bit thicker at startup. Also since 10w30 is obsolete for newer cars in the US, I have been able to find great deals on it. The oil I took out of here I paid $1/qt for name brand oil (and $10 for the whole oil change). As caprice_2nv said, it does have less viscosity index improvers so it *should* hold it's grade better (theoretically, and 5w30 has been known to shear to a 20 after a few thousand miles but may be less common with newer API oils) and therefore also has more "lubricating oil" in it. I personally think that anyone who has a car spec'ed at an Xw-30 weight, it is beneficial to just put 10w-30 in during warm months but I'm sure there are scientific reasons why the manufacturers recommend a 5w-30 or a 0w-30. I know that PYB 10w-30 has great results for people with higher mileage cars, even those spec'ed for a 5w-20 weight.
 
Messages
9,880
Location
Birmingham, AL
1994 Explorer 4.0 - 250K mi Out: O'Reilly's conventional 5W30 and MicroGard oil filter with around 3500 miles on it. In: O'Reilly's conventional 10W40 high mileage and Wix oil filter. 2002 Ranger 3.0 - 231K mi Out: NAPA or O'Reilly's 5W30 synthetic high mileage, some Mobil 1 top off, Wix filter, probably 8000 miles but there was top off. In: O'Reilly's 5W30 synthetic high mileage, Wix filter. Need to do the other Ranger but it's really nasty outside.
 
Messages
467
Location
FL
2003 avalanche 173k Out Mobil 1 /ac delco classic filter In Penzoil ultra platinum & purolator 1 filter in
 
Last edited:
Messages
13,196
Location
Maricopa Arizona
2018 Silverado Z71 LT2 Crew Cab with 5.3 42248 miles. Out 8 quarts STHM with AC Delco E-CORE In 8 quarts Valvoline Full Synthetic with Maxlife Technology and WIX Filter.
 
Messages
15,579
Location
In the shop
Friend of my real dads 1992 Ford F-150, in line 6 cylinder 2wheel drive. 200,xxx miles on truck. Out: Rural King all fleet 10w30 HDEO and a MC filter In: Rural King 15w40 and a Tough Guard filter
 

irv

Messages
2,159
Location
Oshawa, Ont. Canada
2008 2.4L Chev Malibu Out: Pennzoil Platinum 5W-30 and TG 9018 filter off. In: Pennzoil Ultra Platinum 5W-30 and TG 9018 on. Only 5000 km's on the used oil but a mechanic at where my son did his co-op said frequent oil changes are imperative with this engine so my son ate that up. 30% was remaining and I told my son he could easily do 2 OLM revolutions using this oil and filter combo. Of course, dad knows nothing and this Midas mechanic knows it all. smirk2
 
Messages
12,679
Location
Kendall, FL
Took the car to the dealership for a TSB. They changed the oil with their bulk when i made no such request. The Service Writer i usually go to apologized and they gave me new engine and cabin air filters. I wasn't that upset since these guys have always been great. Since they don't know what brand the bulk is ( only that its a blend), when i got home....

20190713_173034.jpg
 
Messages
12,679
Location
Kendall, FL
Originally Posted by ka9mnx
Funny how people with good intentions think they are doing you a favor...
Yes, and they really are good guys. They know I'm not one to take advantage of a situation. But as a company, i guess they have to make sure some manner of compensation was extended.
 
Top