Engine Oil for 03 Yukon 5.3L RWD

[BigSarge77]

Just curious if i could/should start using a Synthetic oil?

 

i have a little over 130K miles

[Grumpy Bear]

Isn't like asking your cardiologist if you should stop your bad eating habits when you are 90 years old? 

Edited October 16, 2021 by Grumpy Bear

[txab]

You can use synthetic or just use whatever you've used until this point. Any of the name brand oils will get you through providing you use the proper change interval. Goes for dino or synthetic. If you go synthetic plan your purchases and you can get synthetic oils at a pretty cheap price thanks to rebates

[Z45]

With synthetic oil, you get what you pay for.  

[Black02Silverado]

You can and the benefits of running cooler and keeping the engine clean inside are a plus.  Never to late to start.

As stated above, what you have been using is doing well, but if you are interested in AMSOIL let me know.  I can get you a quote delivered.

 

If you want to see a capacities for your vehicle you can look that up here. 

[Grumpy Bear]

6 hours ago, txab said:

You can use synthetic or just use whatever you've used until this point. Any of the name brand oils will get you through providing you use the proper change interval. Goes for dino or synthetic. If you go synthetic plan your purchases and you can get synthetic oils at a pretty cheap price thanks to rebates

 

Watch this on sale and you can find it in store several times a year for $25 for 10 quarts

Cheaper than most conventional oils

I buy 5 or 6 cases at at time when on sale.

 

[pokismoki]

12 hours ago, Grumpy Bear said:

 

Watch this on sale and you can find it in store several times a year for $25 for 10 quarts

Cheaper than most conventional oils

I buy 5 or 6 cases at at time when on sale.

 

PLease stop talking about this oil , I'm having a hell of a time trying to get the stuff.. couple months ago COstco had several pallets on the floor,  now people are grabbing the stuff up like toilet paper... loose lips my friend, SHHHHH

[swathdiver]

On 10/15/2021 at 11:50 PM, BigSarge77 said:

Just curious if i could/should start using a Synthetic oil?

 

i have a little over 130K miles

One of the benefits of synthetics is that they break up the sludge build up inside your motor.  One of the downsides of synthetic is that they break up the sludge build up inside your motor.

[Grumpy Bear]

1 hour ago, swathdiver said:

One of the benefits of synthetics is that they break up the sludge build up inside your motor.  One of the downsides of synthetic is that they break up the sludge build up inside your motor.

 

This can be true specifically but not necessarily universally. Cleaning is be done by: 

 

1.) Detergency

2.) Solvency

3.) Dilution

 

PAO and Group III are poor solvents. However Esters, Diesters, Polyol Esters, and PAGS are very VERY good solvents. Even small amounts (15% min) drastically improve solvency.  

 

Synthetics that are PAO/Group II blends rely on large amounts of over based detergent. Even those have trouble staying in suspension. (Shake bottle well is an indicator) 

 

Our best cleaning method is still dilution...CHANGE YOUR OIL. 

[diyer2]

Why NOT?

[BigSarge77]

Thanks for all the insights...I am running conventional oil and everywhere you look synthetic is taking over the shelves.

[pokismoki]

just be sure to use a low temp themostat for conventional oil

[Grumpy Bear]

On 10/17/2021 at 10:55 AM, pokismoki said:

just be sure to use a low temp thermostat for conventional oil

 

That's insightful